Features: Achieve precise and consistent bed levelin with this automatic inductive sensor for your 3D printers. This LJ1A34 Z inductive sensor accurately detects metal objects within a 4mm distance, ensuring reliable operation. Very useful and inexpensive solution for automatic heat bed level regulation. It detects metal objects within a distance of 4mm (aluminum printed surfaces) Improve your 3D printing setups with this advanced inductive sensor, ensuring precise bed leveling for superior print quality. Specifications: Name: 3D Printers LJ1A34-Z Inductive Proximity Sensor Detection Size: about M12x50mm Detection distance: 4mm Cable length: 110cm/39.37in Voltage: DC6-36V Wiring color: Power (positive): Brown Common/Ground: Blue Signal: Black Package Includes: 1PCS LJ12A3-4-Z Auto Bed Leveling Inductive Proximity Sensor Detection DC6-36V note: Due to the problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 1cm errors due to measurement.