Compatibility: Fit with MK10 hotend aluminum cooling block, such as DIY MK10 3D printer, for FLASHFORGE Creator Pro, for FLASHFORGE Creator X, for FLASHFORGE Dreamer, Dremel Idea, Builder PowerSpec 3D, Pro PowerSpec 3D X, Wanhao Duplicator 4S, Wanhao Duplicator 4X, Wanhao i3, etc. Brass material advantage: The heat conductivity of brass is 7 times as high as that of stainless steel. MK10 hotend structure only allows filament to have little contact with the nozzle. The material of the nozzle must be brass to ensure filament’s temperature is the same as the thermistor, so it make the melt plastic more smooth. But the heat conductivity of stainless steel is so poor, it is unscientific and irrational used on MK10 nozzle; Improved Version: an M3 threaded hole has been added to the aluminum block, making it suitable for both M3 and M4 thermistor; Quantity and specification: 1 piece MK10 hotend kit, it include these parts: 0.4mm nozzle with M7 thread 1 piece, throat with 1.75mm PTFE tube 1 piece, aluminum heater block 1 piece. Material: Nozzle is brass. Throat is stainless steel. Heater block is aluminium alloy. Specification of nozzle: Compatibility:MK10 hotend M7 thread aluminum heater block; Output diameter:0.4mm; Input diameter:1.75mm; Size:M7; Material:Brass. Specification of throat: Compatibility:MK10 hotend M7 thread aluminum heater block, MK10 aluminum cooling block; Filament diameter:1.75mm; Size:lower thread M7, upper diameter φ7.8mm; Length:26mm; Material:Stainless steel with 2mmX4mm PTFE tube. Specification of aluminum heater block: Compatibility:MK10 M7 nozzle, MK10 M7 throat, φ6mm cartridge heater, M3 or M4 thermocouples; Shape size:20mm*20mm*13mm; Material:Aluminium alloy. color:silver Package Contents: 3 piece Brass nozzle 3 piec