Electronics binding post suitable for 4mm Banana Plug Stable performance, professional production, and easy to install 10 pairs of 4mm Banana plugs socket ( 10 x red and 10 x black ) Screw connector fitting, no soldering needed Standard size fits most speakers Best used with banana jacks, not wire locked terminal connectors. Brand NEW Material: Copper/Nickel Plated Suitable for 4mm Banana Plug Dimention: Length:33mm Color: Black 10pcs +Red 10pcs