Swift Installation High-Flow Printing Multi-channel Design Upgraded Material Compatible Models: K1(2024), K1 Max (2024), K1C, Ender-3 V3, Ender-3 V3 Plus, K1 SE
Genuine E3D Obxidian™ High Flow Nozzle – K1 Series – 0.4mm
Available from Creality for £29.99.