Matin ABS Plastic Slide Mounts 6x7-50 pcs

I purchased the 6x7 (60x70mm) Matin 50 slide mounts through Amazon from a company Korade in Korea. It was harder to find this size slide mount size than I thought it would be. The mounts arrived new and are made of a hard plastic (ABS) and seem sturdy enough. They are a little flexible to the touch and arrive in the box in 2 sections with all one side of the slide in 1/2 the box, and the other 1/2 on the other side of the box. You grab a cut slide and each side of the mount and click it in place. I haven't tried this yet. It looks like it will be a little tricky to cut the slide to the right size to fit into the little plastic space, but it seems like it has to be like that to keep the slide firmly in place. Once put together, it seems like it will be pretty firm.The slides should fit 6x7cm or 60x70mm film. So it should fit for cameras like Mamiya RZ, Mamiya RB, Mamiya 7, Pentax 6x7. It would not be good for anything longer of shorter, like 6x9 or 6x6. I think they also make a 6x6 version. I don't see a method to convert this somehow to alternative sizes. The exact dimensions of the OUTSIDE of the mount are square 8.5cm by 8.5cm. The inside is cropped very slightly. The long edge isn't really cropped, and won't be noticeable. I grabbed a ruler and just looking by eye it seems like 69.5mm. But with parts of a millimeter, it is hard to be exact. But the shorter edge will cut the image a little, maybe a maximum of 1mm on each side. I measured 55mm on the short edge, so you will lose 2.5mm on each side total. But most of that is non-image border edge. I just measured a roll of processed Fuji Provia slide film and the width of slide is about 60-61mm on the outside, including the non-image border around the image. The image width seemed to be about 56 or 57mm. Hard to tell. That is where is I guess you would lose .75 to 1 mm on each side. I think I read in a forum that this keeps the slide from moving around in the mount. But it also seems like if there were no border then you might see the border when projecting. So this is probably perfect. I haven't tried it yet, but think it won't be bothersome in practice. Also, I don't think from my research that other commercial options exist.The product arrived in 11 days, which was great. That was a week to 3 weeks faster than the standard shipping estimate. It arrived by normal USPS mail. It came in simple waterproof plastic wrapping and some bubble wrap inside around the Matin box. No damage. But the product is not fragile. I feel like if you had taken the original package and thrown it across the room, maybe the Matin box would have a little dent, but the slide mounts would be unaffected.

Good product

Excellent product. I will order more soon.