Compatibility: Fit with MK10 hotend aluminum cooling block, such as DIY MK10 3D printer, for Creator Pro, for Creator X, for Dreamer, , PowerSpec 3D, Pro PowerSpec 3D X, Duplicator 4S, Duplicator 4X, i3, etc.Brass material advantage: The heat conductivity of brass is 7 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 filaments temperature is the same as the thermistor, so it make the melt plastic more . the heat conductivity of stainless steel is so poor, it is unscientific and irrational used on MK10 nozzle;Improved Version: an threaded hole has been added to the aluminum block, making it suitable for both and thermistor; and specification: 1 piece MK10 hotend kit, it include these parts: 0.4mm nozzle with M7 thread 1 piece, throat with 1.75mm 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, diameter 7.8mm;Length:26mm;Material:Stainless steel with 2mmX4mm tube.Specification of aluminum heater block:Compatibility:MK10 M7 nozzle, MK10 M7 throat, 6mm heater, or thermocouples;Shape size:20mm*20mm*13mm;Material:Aluminium alloy.color:silverPackage Contents:1 piece Brass nozzle1 piece Stainless steel throat1 piece 34mm tube1 piece Aluminum heater block