Assembled GT8 Extruder 0.3-0.5mm Nozzle All Metal J-Head Hotend For 3D Printer<br>Description:     Geeetech GT8 extruder adopts high-quality aluminum alloy heat radiator and brass nozzle， with stainless steel pipe as feeding pipe， which ensures good heat insulation effect and prevents blockage. Besides， its surface is covered with anodic oxide coating， which can resist oxidation corrosion and increase nozzle hardness， thus ensuring better heat insulation， stronger corrosion resistance as well as finer and more stable printing.    <br>Specification:<br>Material: All metalWeight: 515gOutline dimensions: 88 x 42 x 119 mm (L \/ W \/ H)Nozzle diameter: 0.3mm， 0.35mm， 0.4mm， 0.5mm optionalNozzle temperature: 180 C - 260 CSuitable for 1.75 \/ 3mm PLA &amp;amp; ABS (not included)Printing resolution: 0.1mmMolding form: FDMPrinting thickness: 0.1mm-0.3mmFlow rate in nozzle: about 24cc\/hMovement speed: 50ccRecommended input voltage: 12VStepper motor operating voltage: 12VCooling fan operating voltage: 12VHeating voltage of extruding head: 12VThermistor: 100K 1% high-precision NTC thermistor     Component:     1. All Metal J-headEnables working with PolycarbonateUp to 300 degrees CelsiusTested with PLA， ABS， polycarbonate， nylon and PVA    <br>2. 42 Stepper motorDimension: 42.3 x 42.3 x 40 mm (L \/ W \/ H)2 PhaseStep Angle: 1.8&amp;plusmn;5% degreeVoltage: 12V DCCurrent: 12A \/ phaseHolding torque: 48N.cm Min.Phase Resistance: 10&amp;plusmn;10% &amp;Omega;(Phase)Phase Inductance: 20&amp;plusmn;20%mH(Phase)Rotor torque: 68g.cm^2Braking torque: 2.6N.cm MAX.Insulation class: B(130)<br>3. Cooling fanDimensions: 40 x 40 mm (3Pin)Voltage: 12V DCCurrent: 0.11ASmall size full of energy to make your printer pretty cool.     4. Cartridge heaterMaterial: Stainless Steel， PVC， NylonVoltage: 12VPower: 30wWire Length : 1mHeater size: 6 x 15mm (D x L)     Package included:     1 x Geeetech GT8 short distance extruder