1. The for p1p hotend is compatible with P1 Series 3D printers but not X1 Series as the ceramic heaters and thermistors for them are different for them. 2. The heat sink, throat, heat block and the removable hardened steel 0.4mm nozzle are assembled, you only need to assemble the ceramic heater and thermistor or keep them for later use. 3. The hardened steel 0.4mm nozzle is removable, you can remove the nozzle the nozzle with just a wrench no need to grab the heat sink, it is a great choice if you often change the nozzle. 4. Small weight and light volume, heating temperature 300 degrees Celsius 5. Support printing PLA, ABS, PETG, TPU ,PP, PC, nylon, , PEL and other consumables Type: Hardened Steel Nozzle Extrusion Head Kit Support printing PLA, ABS, PETG, TPU ,PP, PC, nylon, , PEL and other consumables Color: black+white material: metal Package Contents: 1 x Sprinkler kit (without wire) 1 x Silicon cover 1 x CHT brass nozzle 0.4mm 2 x CHT hardened steel nozzles 0.4/0.6mm 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.