These genuine XT60 connectors are made from high-temp nylon with gold plated sprung pins and sockets. These components are both included in the injection mold at the time when forming the connector which also has the "AMASS" logo molded in. The XT60 ensures a solid high-amp connection, perfect for applications up to and beyond 65A constant. The XT60 was designed by hexTronik to be more reliable and a better quality connection than T style and other similar Connectors.There is no patent on the XT60 connector, we hope this product is sold everywhere in the world and dominates the market, reducing customers dependency on over-priced similar connectors.IMPORTANT: "These are not cheaply copied XT60 plugs. These original nylon XT60 plugs, manufactured by AMASS, can handle over 60A current for extended periods without exceeding 80°C thanks to their better contact surface area. The plug is also less likely to deform or melt in comparison to copied non-nylon XT60 plugs."Genuine nylon high-temp XT60 connectors.XT = heXTronik60 = 60A constantWe're the guys that designed this plug!