301 transparent crystal audio wiring column, integrated copper screw gold plating, nut decorative pad welding piece is iron gold, electroplated light, good contact performance, 4mm jack at the tail, banana plug available.Opening size: 9mm, real shooting.Small packaging, 100 boxes, 10 shots!The price is a quotation.Plastic colors are: red/black, the system defaults to red and black each semi -shipped.(Factory direct sales, large price negotiation discount)