Specifications:Material: Aluminum & Stainless Steel & BrassInstallation type: external thread connectionScope of application: 3D printerNozzle size: 0.4mmThroat pipe length: 30mmAluminum block size: 20 mm x 20 mm x 10 mmOperating temperature range： -40 ~ +260°C (-40 ~ +500 °F)Thermistor and heater cable length: 1MFeatures:100% brand new and high quality.Tip of the nozzle， aluminum heating block， Throat pipe (built-in Teflon).MK8 Extruder Hot End kit， white wire was temperature thermistor， red wire was heating tube 12V40W.Package included:1x Aluminum block1x Heating tube (heating tube 1 m long， 12V 40W)1x 1.75MM 0.4MM Brass Nozzle1x M6*30mm Throat pipe (built-in Teflon)1x Thermistor + Brass sleeve (1 meter long)