These items are professional and practical banana connector plugs, which are mainly made of durable and sturdy gold-plated alloy material, very practical and long time service, this item is no soldering needed and its standard size fits most speakers. Features - Color: Golden. - Material: Alloy. - Size: About 3.8X1X1cm/1.49X0.39X0.39inch. - Insulation resistance: 50 (M). - Operating temperature range: 90 ( degree centigrade). - Adopt , high temperature resistance, longer service life. - This item is no soldering needed and its standard size fits most speakers. - Well conductivity, steady, constant temperature, and insulated, prevent dust, protect conductor. - User-friendly design, reducing the obstacles when inserting or removing, making the plug disassembly easier. - Plug is gold plated, insure to use thousands of times without fall out, makes plug , prevents oxidation,extends lifespan. Package list: 36 Plated Banana Audio Plugs with 36 Plated Banana Audio Plugs with Black Ring