This is a knob for Creality printer extruder such as Ender 3, Ender 3 Pro and CR-10. Just download and print the button. Printing is easier upside down. You can easily see if the extruder is workin
This is probably the best filament guide for Ender 3 ever invented. The guide consists of two parts - a guide it self and a clip. The clip is simply pushed into the 2020 aluminum frame of the Ender 3.