By using progressively designed solenoid and hall sensor,It can integrate high precision in such a simple structure. pushing hard on the push-pin can damage Press sensorand less accurate. Fix push-pin with locking paint after reassembling or adjusting core. Do not remove or deform elastic material attached on the push-pin. No matter how bad your 3D printer is. The sensor is still working Voltage: 5V Current: 15mA Maximum() Current: 300mA Case Material: Polycarbonat(PC) Case Color: Semitransparent White Cable Length: 150mm Colour:Photo Color Material:Plastic + aluminum Package Contents: 1* set Press Auto Bed Leveling sensor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.