Features 1、Copper Material: Using excellent copper material, the connectors are durable and have stable performance. 2、Main Features: The banana plug male female connector has good transmission performance, contact performance, resistance to plugging and unplugging. 3、CNC Process: The banana connector is manufactured by CNC process technology with high precision. 4、Gold Plated Treatment: The gold plated process can prevent the connectors from aging and oxidation. 5、Application: Used to connect brushless motor with electronic speed control, connect ESC or battery with electronic equipment such as RC helicopter. Specification Item Type: Banana Plug Male Female Connector Model: 12.050; 12.051 Material: Gold Plated Copper Product Color: As Pictures Shown 12.051 Size: Inner Diameter: Approx. 4.00mm / 0.16in Outer Diameter: Approx. 4.80mm / 0.19in 12.050 Size: Top Pin Diameter: Approx. 4.00mm / 0.16in Product Weight: Approx. 54g / 1.9oz Purpose: Electronic measuring accessories Package List 10 x Gold Plated Copper Connector (Male) 10 x Gold Plated Copper Connector (Female)