Size: 6 Pairs (12 PLUGS) W&G Global Electronics Inc. mainly produce Test lead with Alligator Clips, HDMI Cables, Banana Plugs, Wire Strippers and so on. We only provided high quality and good price products to each customer. Closed screw type, Material: copper, Size: 4mm, length: 45mm, Surface: 24K gold plated, Color: red/black plastic ring, Can accept bare wire or spades, Can accept 18 to 12 AWG speaker wires, Color coded black/red rings for maintaining proper polarity, Secure, positive contact with binding posts, No soldering required