The copper screw is a one-piece copper rod car processing gold-plated, bright electroplating, good contact performance, and good plug-in force. Plastic colors are: red, black. The total length of the terminal: 35mm, the diameter of the metal cap: 12mm. (Except for the nut, the welding piece, the gasket is iron). Small package, 100 pieces per box, 10 pieces start! The price is a quote.(Factory direct sales, large quantity and price negotiation discount!)