Item Type: Aviation Plug_x000D_ Shell Material: Zinc Alloy_x000D_ Connector Material: Silver Plated Copper_x000D_ Plug Life: 500 Times_x000D_ Insulation Resistance: 1000M_x000D_ Contact Resistance: 3M_x000D_ Hole Size: Approx. 30mm / 1.18in 1For Connection: With this aviation plug socket, you can have firm and safe electrical connection without loosening or leakage. 2Practical Uses: Can be widely used to computer automatic measurement and control system, mechanical equipment, automotive, etc. 3Great Material: Combining zinc alloy shell and silver plated copper connector, the power adapter has 500 times plugging life. 4Reliable Works: The plug socket has 1000M insulation resistance and 3M contact resistance to ensure safe and stable working. 5Easy to Install: Designed to have a light weight and a compact size as well, the installation is very convenient to complete. 1 x Aviation Plug Socket 3 x Screw 3 x Nut 3 x Washer 1 x Accessory