Features Standard Size: mm socket, total length: approx. 30mm/1.2inch, panel opening: approx. 12mm/0.5in, convenient to connect with banana plug. Good Insulation Performance: The insulator of this banana socket adopts high temperature, high insulation material body and resistance to high pressure. Premium Material: The conductor is made of brass nickel-plated socket, good conductivity, resistance to insertion, anti-oxidation and durability. Good Replacement: There are total 10pcs mixed color banana plug socket in package, easy to replace your old or broken ones. Easy to Install: The banana socket comes with nut, convenient to install, fixed fastening, not easy to loosen. Specifications: Material: Brass + PA Total Length: Approx. 30mm/1.2inch Panel Opening: Approx. 12mm/0.5in Jack Diameter: 4mm / 0.16 inch Width: Approx. 13mm / 0.5inch Color: Red, Green, Yellow, Blue, Black Quantity: 10pcs Weight: Approx. 49g / 1.7oz Package List: 10 x Panel Mount Banana Socket Package List