4PCS 3D Printer Flat Bed Die Springs Level Upgrade Kit Ender 3 Pro V2 CR-10 CR-X
Note for the Ender 3 V2: If you have trouble fitting the springs, raise the Z Stop just a touch. It may have been installed too low. This is one of the best upgrades you can do to your printer. Each item consists of a set of 4 springs.