This is a replacement lever and extruder plate for Wanhao Duplicator 6 and all of its clones. Lever and plate are CNC machined from 6061 billet aluminum, with weight reduction features. It will replace a stock plastic assembly that has tendency to warp over time from heat and force. This is a direct replacement, with no modification needed. Fits: Wanhao Duplicator 6, Monoprice Maker Ultimate 3D Printer