Flexion - Hardened nickel nozzle 0.4mm.
Nozzle designed and manufactured by Micro Swiss. From the MS website: 360 brass base material and plated with TwinClad XT coating. TwinClad XT is a nickel composite coating designed for very low friction. It offers one of the lowest coefficient of friction, better than nickel with PTFE co-deposit. This coating is also very hard and abrasion resistant.