MK10 Stainless Steel Thermal Barrier Tube with PTFE Liner
Inside diameter: 2.1mm
Outside diameter: 7mm
The total length:28.1mm
Built-in PTFE Insulation Tube for 1.75mm Filament.
Note: The Nozzle is M6 Threaded Screw. It's NOT compatible with Wanhao and Flashforge 3D Printer. - See more at: http://www.robotdigg.com/product/506/MK10+large+caliber+nozzle#sthash.TFp8ElAv.dpuf