【High temperature and corrosion resistance】: These high quality copper contacts are made of red copper, resistant to high temperature and corrosion, strong and durable, and have a long service life. 【Provide good thermal and electrical conductivity】: These high quality copper contacts can provide good thermal and electrical conductivity to achieve constant current transmission to the wire. 【More Stable】: They also have a smoother center hole, which can reduce the friction when the welding wire passes, thereby providing a stable welding wire with reduced resistance. 【Applications】: These high quality copper contacts can be applied to Binzel 15AK MIG welding torches. 【Easy to use】: The copper contact has a simple structure and is easy to install. If you have a flashlight at home, it will be an ideal spare part.