●【Specification】Size: 12/25”ID x 1/2”OD (12-13mm); Length: 5.9”(150mm); 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.