Creality K1 Series CFS Upgrade Accessory Kit for K1,K1C,K1 MAX,K1 SE 3D Print...
Creality CFS Upgrade Accessory Kit for K1, K1 MAX, K1C, K1 SE to Connect CFSUpgrade to Multicolor Experience Now! You can even hook up four CFS units for 16-color printing. It is also great for creating snap-away supports.