This is MK10 style nozzle, it is made from a 360 brass base material and plated with TwinClad XT coating. TwinClad XT is a nickel composite coating designed for very low friction. It offers one of the lowest coefficient of friction, better than nickel with PTFE codeposit. This coating is also very hard and abrasion resistant. If you are working with abrasive Carbon Fiber, Stainless Steel, wood filled or any other metal filled filaments, this will greatly improve the life of your nozzle. Fits: FlashForge Creator Pro, FlashForge Creator X, FlashForge Dreamer, FlashForge Finder, Dremel Idea Builder, PowerSpec 3D Pro, PowerSpec 3D X, Wanhao Duplicator 4S, Wanhao Duplicator 4X, Wanhao i3, Monoprice Maker Select 3D Printer v2, Cocoon Create 3D Printer