ITEM NAME:Upgraded Auto Bed Leveling Sensor Kit for Ender-3 Ender-3s CR-10 CR-20 Pro Description: An automatic level sensor for 3D printers based on open-source Simple, high quality, elegant and precise 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 Material: plastic Package Includes: 1 Piece Link line 2 Sets Adapter plate 1 Set Recorder 4 Pieces Screw 1 Piece Wrench.Item Type: Auto Press Bed Leveling Kit. Used for 3D printer for Ender-3 Ender-3s Ender-3 Pro CR-10 CR 10S CR-20 CR-20 Pro 3D Printer. An automatic level sensor for 3D printers based on open-source. 4 Pieces Screw.