This an auto bed leveling sensor kit for Printers that can precisely measure the tilt of bed This printer accessories easier to levelling the hot bed, which can precisely measure the tilt of Bed . Bed leveling is not a problem anymore This printer kit could work with any kinds of bed materials, such as glasses, woods, metals, and so on This auto bed leveling sensor has 2 different connection lines.One extension cable is for CR10.Another extension cable is the same as for the BL TOUCH cable This for BL touch auto board is fulfilled with simple structure and high precision by using progressively designed solenoid and hall sensor Colour: black Material: metal Size: 10 x 5 x 3 cm Package Contents: 2 x Connection Line 1 x Bracket 2 x M3X8 Screws 2 x M3X6 Screws 2 x Cable Tie Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.