Swift Installation High-Flow Printing Upgraded Material Multiple Aperture Options Compatible Models: K1(2024), K1 Max(2024), K1C, K1 SE, Ender-3 V3, Ender-3 V3 Plus *NOTE: The integrated quick-swap nozzle is not included in early models of the K1 Speedy and K1 MAX. Please install the K1 Series Ceramic Heating Block Kit-Quick-swap Nozzle Kit before purchasing the "Unicorn" Quick-Swap Nozzle Kit.