ITEM NAME:Upgraded Auto Bed Leveling Sensor Kit for Ender-3 CR-10 CR 10S CR-20 img *{margin:0;padding:0;.Used for 3D printer for Ender-3 Ender-3s Ender-3 Pro CR-10 CR 10S CR-20 CR-20 Pro 3D Printer. Item Type: Auto Press Bed Leveling Kit. An automatic level sensor for 3D printers based on open-source. 4 Pieces Screw.