100% brand new and all parts are tested and quality controlled before shipment. Compatible with: MK10 hotend M7 thread aluminum heating block, such as Creator Pro, Creator X, Dreamer, Finder, for Idea Builder, PowerSpec 3D Pro, PowerSpec 3D X, Duplicator 4S, Duplicator 4X , i3, maker select plus, Create, etc. Advantage of brass material: The thermal conductivity of brass is 7 times higher than that of stainless steel. The MK10 hotend structure only allows the filament to have slight contact with the nozzle. The nozzle material should be brass to ensure that the filament temperature is the same as the thermistor, making the molten plastic more uniform. However, the thermal conductivity of stainless steel is so poor that it is unscientific and irrational to use on the MK10 nozzle. Material: The nozzle is brass. The throat is stainless steel. The heating block is made of aluminum alloy. Color: As shown Material: metal Package Contents: 2 x 0.4mm M7 Brass Nozzle 2 x 1.75mm Stainless Steel Throat 2 x 34mm PTFE Tube 2 x Aluminum Heating Block Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item to be slightly different from the real one. The allowable measurement error is +/- 1-3 cm.