CR10 Series Z Sync Kit for 3D Printers. This is compatible with Creality Printers. Save yourself many hours of having to level your printer every time you turn it on. Not many know as soon as you power off your printer, the z axis comes out alignment due to the weight on the heavy side. This kit helps prevent that. This fits Creality CR-10 series printers (CR-10, CR-10S, CR-10S Pro, CR-10S Pro V2, CR-10 V2, CR-10 V3). Only takes minutes to install. Then level your printer and done. Support US Businesses!