Features: Material: Nozzle is brass. Throat is stainless steel. Heater block is aluminium alloy. Compatible with MK10 hotend aluminum cooling block, such as DIY MK10 3D printer, for FLASHFORGE Creator Pro, for FLASHFORGE Creator X, for FLASHFORGE Dreamer, Builder PowerSpec 3D, Pro PowerSpec 3D X, Wanhao Duplicator 4S, Wanhao Duplicator 4X, Wanhao i3, etc. The thermal conductivity of brass is 7 times higher than that of stainless steel. The MK10 hotend design limits filament contact with the nozzle. Using a brass nozzle ensures consistent filament temperature matching the thermistor reading, resulting in smoother plastic melting. An M3 threaded hole is included in the aluminum block, making it compatible with both M3 and M4 thermistors. Quantity and specification: 1 piece MK10 hotend kit, includes: 0.4mm nozzle with M7 thread (1 piece), throat (1 piece), aluminum heater block (1 piece). Specifications: Compatibility: MK10 Hotend M7 Thread Aluminum Heater Block Nozzle output diameter: 0.4mm, input diameter: 1.75mm Size: M7 Material: Brass, Aluminum Alloy, Stainless Steel Throat specifications: Compatibility: MK10 hotend M7 thread aluminum heater block, MK10 aluminum cooling block Filament diameter: 1.75mm Material: Stainless Steel Color: Silver Item size: approx 2x2x5.2cm / 0.79x0.79x2.04in Note: Package includes only the items listed above; other products are not included. Due to lighting effects and shooting angles, slight variations in color or appearance may occur. Please allow 0-1cm error due to manual measurement. Package includes: 1 x Brass Nozzle 1 x Stainless Steel Throat 1 x Aluminum Heater Block