Compatibility: compatible with all 1.75mm V6 E3D Makerbot 3D printer. Notice: Small parts, keep away from children Specification: 12V/40W heater,temperature can be up to 280°C（Long-term temperature: 240°C/ short-term temperature: 280°C） 12V high speed fan with shroud, radiating quickly One meter long PTFE/teflon tubing 4mm OD 2mm ID PC4-01 tube fitting A v6 heating block Outer thread : M6 M7 Throat outer diameter: 6mm Throat inner diameter: 4mm Teflon pipe inner diameter: 2mm Length of nozzle throat: 22.5mm Filament diameter : 1.75mm Extruder brass nozzle input diameter: 1.75mm Extruder brass nozzle output diameter: 0.3mm 0.4mm 0.5mm Package including: 1 x all metal V6 hotend 12V/40W/1.75mm/0.4mm nozzle/ extruder 1 x 12V high speed fan with shroud 1 x One meter long PTFE/teflon tubing 4mm OD 2mm ID 1 x PC4-01 Tube Fitting 1 x 0.3mm nozzle print head 1 x 0.4mm nozzle print head 1 x 0.5mm nozzle print head 1 x V6 heating block 2 x teflon tube within stainless steel nozzle throat