【Specification】Size: 12/25”ID x 1/2”OD (12-13mm); Length: 10”(250mm); 3PCS 【High quality metal material】Straight copper round tubes are made of high quality copper with good electrical and thermal conductivity and can be processed and cut as required. 【Smooth & Seamless】The surface of the round copper tube is smooth and seamless for precise application. 【Wide Application】Applied to electrical and thermal conductivity equipment, it can be welded. It can also be used for metal craft & metal working hobbies, DIY model making, home decoration, frames and more. 【Warm Tips】 Due to the nature of metallic copper, the surface may oxidize, which does not affect use. Polish with fine sandpaper to restore gloss.