All-metal gold-plated, bright electroplating, good contact performance, good plug-in force. The colors of the color circle are: red/black. The total length: 50mm, the outer diameter of the terminal: 10mm, the diameter of the thread: 6mm. Small package, 100 pieces per bag, 10 pieces start! The price is an quotation. (Factory direct sales, large quantity and price negotiation discount.)