Brass Nozzle:You can change a nozzle with your finger without using any tool. HeaterCore:Heat up in seconds. And to use. Remarkably : as low as 198g. Labor-Saving Lever:Easy to control the in and out of filaments.Dual Gear Feeding & Adjustable Tension:7:1 gear ratio, 7.5kg maximum extrusion force, smoother feeding. Adjustable filament loading tension to better suit flexible filament.High Temperature Resistant:Support printing 300 filament. Parameters:Extrusion : Dual Gear Extrusion. Maximum Printing Temperature: 300. Weight: 198g (including the fan.)Maximum Extrusion Force: 7.5kg (depending on the filament.). Extrusion (based on the existing): 1800mm/min(depending on the filament.)E step: 932/mm at 16 microstep (Further calibration is recommended.).Rotation distance: 3.433. Recommended Motor Current: 800mA Gear Ratio: 7:1 Drive Gear Circumference: 24.5mm Filament Diameter and Tolerance: 1.75 0.05mm HeaterCore Power: 40W Voltage: 24V Thermistor Type: Semitec 104NT-4-R025H42G(NTC100K) Dimensions(including the fan): 75.8 x 38.4 x 74.2mm Thread of Heat Break: Nozzle Diameter: 0.4mm Filament Support:ABS,HIPS,PLA,PET,PVA,TPU Compatible 3D Printers:B1,BX,Ender3,Voron2.4,Voron V0,Vzbot Note: Not compatible with standard NEMA14 motor. Fan Specifications: Size:35 x 35 x 10mm Cable:1000mm Voltage:24V Speed:600010% Terminal Model: 2.54 Motor Specifications: Rated Voltage:DC 3.45V Rated Current:DC 1.5A/phase Phase:2 Winding DC Resistance (25):2.3X (110%)ohm Winding Inductance:2.0X (120%) Holding Torque: equal 110mNm Positioning Torque:7mNmREF Insulation Resistance: equal 100Mohm (DC 500V) Insulation Level:Class B Moment of Inertia:8gcm Maximum Operating Temperature: Fan: 50 Motor: 130 Heater Break and Nozzle: 300(upgradable to 500 with high temperature of Nozzle and HeaterCore) Bearing: 100 Note: it is the maximum working temperature of a single part, not of the whole system. Colour:black Material:Metal Package Contents: 1 x Extruder 1 set x accessories 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.