This is a compatible Nozzle for the very popular hotend from E3D-Online or any other similar hotends. The nozzle are available in 0.2-1mm diameter for both 3mm and 1.75mm filament. The nozzles are Stainless Steel which is a must if you want to print with metal or carbon filled filaments, Specifications: Orifice size: 0.2-1mmFilament size: 1.75 Thread: 6mmLength: 12.5mmMaterial: Stainless Steel  Please note this is not a genuine E3D-nozzle.