Heater Block Assembly Set For Makerbot 3D Printer MK7 MK8 Extruder Hot EndSpecifications:Size: 20 * 20 * 10mmMaterial: AluminumScrew: M6 and M3Heat pipe: 6mmThermocouple: 3mmHeating tube voltage: 12VHeating tube power: 40WSuitable for the Makerbot printerFeatures:Environmental protection、 safety、 soundHigh-quality materials、 fine workmanshipStrict quality control system、 quality assurancePackage includes:1 x Heater Block Assembly Set