[Compatible 3D Printers]: This extruder hotend replacement kits are only compatible with for S1/for S1 Combo FDM 3d printers, not for other 3d printer models. Please confirm your 3d printer model before ordering. [Easy Installation]: Compact form factor, the heater block, heatbreak, 0.4mm nozzles come with modular design, eliminating the need for wiring and stripping work. Therefore, this assembled printhead hotend is very easy to install on for S1/ for S1 Combo 3D printers. [Support High Speed Printing]: Semi-assembled hotend with all-metal throat design makes the print head heated evenly and the filament flows smoothly in the throat nozzle to support high speed printing. And produced by a rigorous design and testing team, no leakage and clogging, you can easily start your 3D printing experience. Color: As Shown Material: Plastic+Metal Package Contents: 1 * Nozzle Head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.