if it isn't marked on the tubing you would have to measure it as wall thickness determines. Most likely in coil tubing it is type m though

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BELLA BAYS Copper Tubing 1/2" OD x 0.445" ID x 50 ft, 99.9% C12200 ASTM B280 Refrigeration ACR Tubing Seamless Soft Coil Round T2 Pure Copper Tube for HVAC System, Refrigerator, Industry, DIY

BELLA BAYS Copper Tubing 1/2" OD x 0.445" ID x 50 ft, 99.9% C12200 ASTM B280 Refrigeration ACR Tubing Seamless Soft Coil Round T2 Pure Copper Tube for HVAC System, Refrigerator, Industry, DIY

Q: How efficient is the thermal conductivity of the ACR copper tubes?

The thermal conductivity of ACR copper tubes is known for its high efficiency in heat transfer. The specific thermal conductivity value may depend on the specific grade or type of copper used. However, as a general guideline, copper has a high thermal conductivity of around 401 W/(m·K) at room temperature.

Q: can this tubing handle the pressure in r410a refigerant systems?

This tubing appears to have thinner than standard wall thickness. I haven't been able to find pressure ratings for it. Extrapolation from published data gives a pressure rating of 420 psi which equates to 120°f for 410a. Low side operating pressure should never be that high but if no part of the system is at or below 120° while the system is off you will go over rated pressure. Burst pressure should be several times rated pressure so there is a safety factor.

Q: Is the tube the size advertised？Can i put a 3/8" fitting on this 1/4" tuning?

I doubt you could do that but I don't know for sure

Product ID: 541861113

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Details

Brand
BELLA BAYS
Material
Copper
Colour
Copper
Product dimensions
15.24L x 0.01W
Item weight
4.28 Kilograms
Nominal wall thickness
0.028in/0.7mm

⏳Nitrogen charged for enhanced corrosion resistance & lifespan

🔥99.9% pure C12200 copper for superior thermal conductivity

🛠️Seamless & soft coil for easy bending

Frequently Bought Together

Description

🔥 Bend, Build, and Boost Your System with Pure Copper Power!

BUILT TO LAST - Nitrogen charged treatment prevents oxidation and corrosion, extending system longevity.
PRECISION ENGINEERED - Meets ASTM B280 standards with exact 1/2" OD x 0.445" ID dimensions for seamless integration.
VERSATILE APPLICATION - Ideal for refrigeration, HVAC, electrical, and creative industrial uses—your all-in-one copper solution.
EFFORTLESS CUSTOMIZATION - Smooth, flexible tubing bends at any angle—perfect for bespoke HVAC or DIY projects.
PREMIUM THERMAL PERFORMANCE - Crafted from 99.9% pure C12200 copper, ensuring top-tier heat transfer efficiency.

BELLA BAYS Copper Tubing is a 50 ft seamless coil of 99.9% pure C12200 copper, engineered to ASTM B280 standards. Featuring a 1/2" outer diameter and 0.445" inner diameter with 0.028" wall thickness, this annealed tubing offers exceptional thermal conductivity, corrosion resistance via nitrogen charging, and easy bendability—ideal for HVAC, refrigeration, and versatile industrial or DIY applications.

Specifications

Manufacturer	BELLA BAYS
Size	1/2" OD
Colour	Copper
Style	50 FT
Finish	Copper
Material	Copper
Pattern	ASTM-B280
Item Package Quantity	1
Cutting Diameter	0.44 Inches
Batteries included?	No
Batteries Required?	No
Assembled Diameter	0.44 Inches
Item Weight	4.28 kg

Have a Question? See What Others Asked

How efficient is the thermal conductivity of the ACR copper tubes?

Is this type L ?

can this tubing handle the pressure in r410a refigerant systems?

Is the tube the size advertised？Can i put a 3/8" fitting on this 1/4" tuning?

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