This replacement V6 nozzle for E3D hotends is made of stainless steel (AISI 303). Stainless steel nozzles are suitable for some highly specialised materials, where a standard (brass) nozzle runs the risk of corrosion. The stainless steel nozzle provides the same performance as the brass version, but gives a slightly lower print speed.
This nozzle has an opening of 0.4mm (marking #3) and is suitable for filament with a diameter of 3mm.