Features [Main purpose] Usually used in electronic test equipment to terminate (connect) a single wire or test lead. [High-quality material] The speaker terminal is made of high-quality alloy with good conductivity and insulated with ABS plastic. [Multiple models] A total of 5 colors can be used for color coding, for example: red usually means active or positive terminal; red usually means active or positive terminal. Black means invalid or negative terminal, etc. [Multiple uses] This female binding socket is also an excellent connector for speakers, audio amplifiers and other electrical equipment. [Connection Type] This binding post connector allows several different types of connections, such as banana plugs or pin connectors. Specifications: Voltage: <1KV Current: <5A Mounting Boring Diameter: 8mm Socket Diameter for Banana Plug: 4mm Color: Red, black, yellow, green, blue Quantity: 4pcs each color(total 20pcs) Package Includes: 20 x Binding Posts Package List