Features: Brand new and high quality 5PCS New practical MKS automatic leveling sensor needles, ensure your printer's security. Cost effective upgrade kit and high performance. Made of high quality safety plastic material, has a long service life. Very easy to operate, simple combination installation and use. Compatible for Bltouch, 3D touch, CR touch. Specifications: Item Type: Auto Self-Leveling Sensor Model Number: Auto Self-Leveling Sensor Size: pls see the Pictures Length:35mm/1.37in Material:Plastic Quantity:5pcs Package Includes: 1Set x 5PCS Auto Self-Leveling Sensor Needles note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.