Feature:1. The accessory kit comes with 5 * nozzle extruders + 5 * heater blocks + 5 * throat tubes, enough for use.2. Used as replacement print head, easy to assemble, reliable accessory for 3D printer DIY lovers.3. Universal design, suitable for various 3D printers, such as Anet A8/ A6/ Ender 3, etc.4. External thread diameter of extruder throat is 6mm, input diameter of nozzle and extruder throat is 1.75mm, great compatibility.5. Made of premium metal material, compact workmanship, great for use and durable.Specification:Features:The accessory kit comes with 5 * nozzle extruders + 5 * heater blocks + 5 * throat tubes, enough for use.Used as replacement print head, easy to assemble, reliable accessory for 3D printer DIY lovers.Universal design, suitable for various 3D printers, such as Anet A8/ A6/ Ender 3, etc.External thread diameter of extruder throat is 6mm, input diameter of nozzle and extruder throat is 1.75mm, great compatibility.Made of premium metal material, compact workmanship, great for use and durable.Specifications:Model: Nozzle Extruder + Heater Block + Extruder Throat SetQuantity: 2pcs set / 5pcs set(Optional)--Nozzle ExtruderMaterial: BrassInput Diameter: 1.75mmOutput Diameter: 0.4mmExternal Thread Diameter: 6mm--Heater BlockMaterial: AluminumSuitable for: 3D PrinterNozzle & Nozzle Throat Hole: M6Heater Mounting Hole: 6mm diameterHole for Mounting Screw: M3Thermocouple Mounting Hole: M3Dimensions: 2 * 2 * 1cm / 0.8 * 0.8 * 0.4in(L*W*H)--Extruder ThroatMaterial: Stainless SteelInput Diameter: 1.75mmLength: 30mmExternal Thread Diameter: 6mmInternal Thread Diameter: 4mmPackage Size: 8.5 * 7.5 * 2.5cm / 3.3 * 3 * 1inPackage Weight: 78g / 2.8ozPackage List:5 * Nozzle Extruder5 * Heater Block5 * Extruder ThroatPackage List:5 * Nozzle Extruder5 * Heater Block5 * Extruder Throat