Micro Swiss All Metal Hotend with SLOTTED Cooling Block for Wanhao i3 Fits: Wanhao i3, Monoprice Maker Select 3D Printer v2, Cocoon Create 3D Printer .4mm Nozzle Plated with HIGH LUBRICITY WEAR RESISTANT TwinClad XT Coating Kit Includes: Thermal Barrier Tube, Plated Nozzle and Slotted Cooling block Slotted Clamping system, No set screw to ding and damage thermal tube, Significantly better heat transfer Made in USA by Micro Swiss