The 4 mm banana plug is made of copper, featuring high strength, low resistance, high conductivity and stable mission. Built-in stainless steel spring design can securely fix the wire, the safety of wire connection and prevent the wire from falling off. The shell is made of nylon PA6, flame retardant grade V0. Engineering plastic materials are not easy to fade or deformation. High temperature , not easy to when the wire is on fire. Long service life, not easy to aging. Instructions for use - Prepare the banana plug and cord, open the plug button, align the cord with the socket, insert the cord into the bottom and the button to complete the wiring. Simple, practical and time-saving. Note:Due to different production batches, the color of the objects is slightly different, which does not affect the use. Wiring range:0.2-2.5 square wires Voltage/Current:250V/32A Colour:As Shown Material:copper Package Contents: 10 * Plugs for electrical test inst ents (2PCS Black+2PCS Red+2PCS Green+2PCS Blue+2PCS Yellow) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.