--- product_id: 59059636 title: "Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black" brand: "cooler master" price: "A$520" currency: AUD in_stock: true reviews_count: 12 category: "Cooler Master" url: https://www.desertcart.com.au/products/59059636-cooler-master-masterbox-q300l-computer-case-magnetic-patterned-dust-filters store_origin: AU region: Australia --- # Supports up to 5 fans or liquid cooling Flexible vertical or horizontal orientation Magnetic dust filters for easy cleaning Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black **Brand:** cooler master **Price:** A$520 **Availability:** ✅ In Stock ## Summary > 🖥️ Compact power, limitless style — build your dream rig with MasterBox Q300L! ## Quick Answers - **What is this?** Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black by cooler master - **How much does it cost?** A$520 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/59059636-cooler-master-masterbox-q300l-computer-case-magnetic-patterned-dust-filters) ## Best For - cooler master enthusiasts ## Why This Product - Trusted cooler master brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **360° Showcase:** Edge-to-edge transparent side panel puts your build on full display with 3-way rotatable I/O panel for personalized setup. - • **Space to Breathe:** Spacious interior fits up to 159mm CPU coolers and 360mm GPUs, with 28mm cable management behind the motherboard tray. - • **Custom Cooling Mastery:** Supports dual 140mm front fans, 240mm radiator, plus multiple top/rear fan mounts for ultimate thermal control. - • **Effortless Clean Airflow:** Magnetic dust filters snap on/off for minimalist style and hassle-free maintenance. - • **Versatile Setup, Zero Compromise:** Rubberized thumbscrews enable standing or laying orientation, adapting perfectly to your workspace vibe. ## Overview The Cooler Master MasterBox Q300L is a sleek mini-tower PC case designed for micro-ATX and mini-ITX builds, featuring removable magnetic dust filters, flexible vertical/horizontal orientation, and extensive cooling options including support for multiple fans and radiators. Its transparent side panel and spacious interior allow for clean cable management and showcase your components, making it a perfect blend of style, functionality, and compact versatility. ## Description Versatile mini-tower PC case with removable magnetic dust filters, flexible orientation, and multiple cooling options for customizable airflow and clean, modern style. Review: ✔ Awesome Little Case! (with a Few Small Flaws) - Having had a larger PC case for a while I thought it was time to move to a smaller option. I liked the look of the BitFenix cases but at around the £50 mark, the CoolerMaster Q300L was just what I was looking for price and design-wise. Being able to choose where the USB and power buttons are placed is a cool idea but if you want to use it at the top (like in my setup - Pic above) you will need a USB extension to run the cable down the back of the case. There's plenty of room for cable management and the build quality is good. I have a full sized HDD at the back and there's also space for two SSD's. Having all the holes means that you don't get much airflow pressure but I haven't had any heat issues with my overclocked AMD 1700X. If you're looking at having your PC on the floor, I woudn't choose this case as it'll most likely be full of dust in a few months. For desktop, I've had it running 4 months with minimal dust although you can see a slight dust ring around the front intake fan. When setting up be careful with any fluff and this will easily get stuck into magnet dust filter mesh. If you do decide to buy the CoolerMaster Q300L, you'll also need to invest in some fans as it only comes with one medium-volume fan. LED fans looks great and I've added three plus used the included fan as a front-intake. Pros ✔ Cool Design ✔ Build Quality + Cable Management ✔ Removable Magnet Dust Filters ✔ Compact Size Cons - Only One Fan Included - Perspex Window Tint Is Very Dark - USB Cables a little short I also upgraded the CPU fan to a Arctic Freezer 7 Pro and there's plenty of horizontal room left. If you're going for a big CPU cooler, you might have to watch out with the clearance. Cheers, Jim! Review: lovely case - Great case , plenty of room for hidden cabling. came with a fan installed which I moved to the roof as an additional out with additional fans fitted to the front to provide a positive airflow, plenty of space to do so.. Has magnetic dust covers on the front and top. And a plastic side panel to show of your led,s. Fits my B450M board and RX 580 card comfortably with the SSD hidden away. A nice compact budget case that I think looks more expensive than it was. ## Features - PATTERNED MAGNETIC DUST FILTERS - The custom-designed front and top magnetic dust filters are completely removeable and present a sophisticated, yet cunningly minimalist, functional chassis facade. - VERTICAL OR HORIZONTAL- The MasterBox case features rubberized thumbscrews that enable either a standing or laying orientation with fully-perforated panels for multiple airflow configurations. - MULTIPLE COOLING OPTIONS - The front panel can support up to two 140mm fans or a 240mm liquid cooler radiator. The rear panel supports a 120mm cooling module (fan or radiator), while the top can house two 120mm fans. - EDGE-TO-EDGE DISPLAY - The square edge-to-edge transparent side panel enables a full display of any system build, and includes an I/O panel which can be rotated into 3 different orientations on either side. Behind the motherboard tray is 28mm of allocated space for clean cable management. - SPACIOUS INTERIOR - The MasterBox Q300L supports CPU coolers up to a height of 159mm, graphics cards (GFX) up to a length of 360mm, and power supplies (PSU) up to 160mm in length. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0785GRMPG | | Antenna Location | Gaming, General Computing | | Best Sellers Rank | 24,315 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 148 in Computer Cases | | Box Contents | 1 computer case | | Brand Name | Cooler Master | | Case Type | Mini-Tower | | Colour | Black | | Compatible Devices | Micro-ATX and Mini-ITX motherboards, Cooler Master devices | | Cooling Method | Fan | | Customer Reviews | 4.5 4.5 out of 5 stars (13,575) | | EU Spare Part Availability Duration | 2 Years | | Enclosure Material | Alloy Steel, Plastic | | Fan Size | 144 Millimetres | | Global Trade Identification Number | 00884102038006, 00884102095313, 04719512065488 | | Hard Disk Form Factor | 144 Millimetres | | Internal Bays Quantity | 1 | | Item Dimensions D x W x H | 41.1D x 21W x 41.1H centimetres | | Item Type Name | MasterBox Q300L mATX Case w/Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Air Flow Performance by Cooler Master | | Item Weight | 480 Grams | | Manufacturer | Cooler Master Europe B.V. | | Manufacturer Part Number | MCB-Q300L-KANN-S00 | | Model Name | Q300L | | Model Number | MCB-Q300L-KANN-S00 | | Number of Fans | 3 | | Other Special Features of the Product | Magnetic Dust Filters | | Power Supply Maximum Output | 500 Watts | | Power Supply Mounting Type | Top Mount | | Product Warranty | 2 years | | Supported Motherboard | Mini ITX, Mini ATX | | Total Expansion Slots Quantity | 4 | | Total USB 3.0 Ports | 2 | | Total USB Ports | 2 | | UPC | 884102095313 884102038006 | ## Product Details - **Brand:** Cooler Master - **Case type:** Mini-Tower - **Colour:** Black - **Cooling method:** Fan - **Fan size:** 144 Millimetres - **Material:** Alloy Steel, Plastic - **Model name:** Q300L - **Motherboard compatibility:** Mini ITX, Mini ATX - **Power supply mounting type:** Top Mount - **Recommended uses for product:** Gaming, General Computing ## Images ![Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black - Image 1](https://m.media-amazon.com/images/I/91UOdM9izhL.jpg) ![Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black - Image 2](https://m.media-amazon.com/images/I/81KohRhMOZL.jpg) ![Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black - Image 3](https://m.media-amazon.com/images/I/81+rpaxzoYL.jpg) ![Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black - Image 4](https://m.media-amazon.com/images/I/718+isi0SoL.jpg) ![Cooler Master MasterBox Q300L Computer Case 'Magnetic Patterned Dust Filters, mini tower, Alloy Steel, Modular I/O Panel, Window Side Panel' MCB-Q300L-KANN-S00, Black - Image 5](https://m.media-amazon.com/images/I/811RcaP29JL.jpg) ## Questions & Answers **Q: Does this case have USB 3 on the front io ports ?** A: Yeah it has 2 USB 3 ports, An audio input and output jack and a reboot button (obviously an on/off button as well haha) **Q: Would the Corsair Hydro H100 x 240 fit in this case??** A: Yes it does, I have fitted my Corsair Hydro H100i Platinum RGB on the top. There is plenty of room. You should have zero stress putting an AIO in there. **Q: What size are the fans?** A: It has 3 fans, not one like the other person said. The description and images clearly say it has one at rhe rear and two on thw front panel. They are all 120mm **Q: Does the case have room to comfortable mount a 3.5" HDD?** A: yes there is, in the back if you attach the included rubber feet then it is easy to attach a HDD and there is also room for 2 2.5mm HDD or SSD ## Customer Reviews ### ⭐⭐⭐⭐⭐ ✔ Awesome Little Case! (with a Few Small Flaws) *by J***M on 3 October 2018* Having had a larger PC case for a while I thought it was time to move to a smaller option. I liked the look of the BitFenix cases but at around the £50 mark, the CoolerMaster Q300L was just what I was looking for price and design-wise. Being able to choose where the USB and power buttons are placed is a cool idea but if you want to use it at the top (like in my setup - Pic above) you will need a USB extension to run the cable down the back of the case. There's plenty of room for cable management and the build quality is good. I have a full sized HDD at the back and there's also space for two SSD's. Having all the holes means that you don't get much airflow pressure but I haven't had any heat issues with my overclocked AMD 1700X. If you're looking at having your PC on the floor, I woudn't choose this case as it'll most likely be full of dust in a few months. For desktop, I've had it running 4 months with minimal dust although you can see a slight dust ring around the front intake fan. When setting up be careful with any fluff and this will easily get stuck into magnet dust filter mesh. If you do decide to buy the CoolerMaster Q300L, you'll also need to invest in some fans as it only comes with one medium-volume fan. LED fans looks great and I've added three plus used the included fan as a front-intake. Pros ✔ Cool Design ✔ Build Quality + Cable Management ✔ Removable Magnet Dust Filters ✔ Compact Size Cons - Only One Fan Included - Perspex Window Tint Is Very Dark - USB Cables a little short I also upgraded the CPU fan to a Arctic Freezer 7 Pro and there's plenty of horizontal room left. If you're going for a big CPU cooler, you might have to watch out with the clearance. Cheers, Jim! ### ⭐⭐⭐⭐⭐ lovely case *by A***B on 20 October 2020* Great case , plenty of room for hidden cabling. came with a fan installed which I moved to the roof as an additional out with additional fans fitted to the front to provide a positive airflow, plenty of space to do so.. Has magnetic dust covers on the front and top. And a plastic side panel to show of your led,s. Fits my B450M board and RX 580 card comfortably with the SSD hidden away. A nice compact budget case that I think looks more expensive than it was. ### ⭐⭐⭐⭐ Great Value *by R***D on 12 July 2018* In terms of features this case was very competitive at this price point, overall I'm impressed with the build quality and features. There aren't many good matx cases at this moment in time and the ones that do exist seem to be budget or really expensive. Pros - Nice aesthetic on dust filter. Loads of room for cable management (Even with non-modular psu's) Can position the front Io wherever you want. Very compact but plenty of building space. Good build quality. Fairly cheap. Fits very large graphics cards. Cons - Slightly scratched on inside acrylic panel. Difficult to get acrylic panel off. Could be more mounting points for ssd's/slim hdd's. Overall an excellent case for the price, looks very modern and a pleasure to build in. ## Frequently Bought Together - Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00) - AMD Ryzen 5 5500 6-Core, 12-Thread Unlocked Desktop Processor with Wraith Stealth Cooler - Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power with 120mm Ultra Quiet Cooling Fan, ATX 12V V2.3/EPS 12V Active PFC Power Supply PS-SPD-0500NPCWUS-W --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.au/products/59059636-cooler-master-masterbox-q300l-computer-case-magnetic-patterned-dust-filters](https://www.desertcart.com.au/products/59059636-cooler-master-masterbox-q300l-computer-case-magnetic-patterned-dust-filters) --- *Product available on Desertcart Australia* *Store origin: AU* *Last updated: 2026-05-19*