This high-quality copper tube is made of 99.9% C12200 pure copper, combining excellent durability and performance for professional engineering installation and creative projects. There are three outer diameters (INCH) of 1/4 copper tube, 3/8 copper tube, and 1/2 copper tube, with a wall thickness of 0.8mm. The smooth inner wall can maximize the flow efficiency of refrigerant and resist the erosion of water, refrigerant, and chemical substances. Pure copper tubes have a pure chemical composition and mechanical properties such as tensile strength and hardness that meet relevant standards, ensuring that the tubes will not rupture or deform due to quality issues during use. Excellent ductility allows for smooth bending and shaping when using professional tools, significantly reducing installation time and costs while maintaining structural integrity Copper coil tubes are not only suitable for refrigeration systems of household appliances such as refrigerators, freezers, and air conditioners, as well as commercial HVAC/ACR equipment maintenance, but their versatility extends to creative fields such as DIY handicrafts, building models, and decorative metal components, fully meeting the dual needs of high-end copper material functionality and aesthetic value