Feature: 1. A simple structure and high accuracy are realized through the solenoid and Hall sensor designed step by step 2. By adding many smart functions (such as self-check, alarm, alarm release and touch switch mode, blue LED for indicating servo signal and Z-probe (Zmin) test), which aims to bring convenience and pleasant printing effect to users 3. Automatic leveling sensor possess fine workmanship, excellent performance, easy to use 4. Automatic leveling sensor for 3D printers, which can accurately measure the inclination of the bed surface 5. The product can be used with any kind of bed material, such as glass, wood, metal, etc. Specification: Item Type: Automatic Leveling Sensor Kit Material: PTFE+brass+stainless steel Applicable Models: For Ender-3/Ender-3pro/Ender-5/Ender-5pro PTFE Tube Diameter: Approx. 1.75mm / 0.1in, Length: Approx. 1meter / 3.3ft Feature: The main function and control of the product are the same as the usual automatic bed leveling sensor, which is composed of RC servo and micro switch. Therefore, the product can be applied to almost all boards. Self-Test: When the power is turned on, the pushpin operates twice during the test. Alarm: If a problem is found during self-check or operation, the LED indicator will flash. Bad Wiring Indicator: Blue and red LEDs indicate poor wiring. Easy to Use: This automatic bed leveling sensor makes leveling the hot bed easier, and can accurately measure the inclination of the bed surface. Flat bed is no longer a problem. Intelligent Self-Checking Alarm: The automatic leveling function is adopted to make the use easier and improve the forming power. . Package List: 1 x Automatic Leveling Sensor1 x SD Card Converter(adapt for Ender-3 V4.2.7 version mute motherboard)1 x Connecting Line1 x Bracket2 x Cable Tie1 x Wrench 4 x Screw1 x 1.75mm Blue PTFE Tube 1meter1 x Large and Small Pneumatic Connectors1 x MK9 Brass Nozzle 0.2mm1 x MK9 Brass Nozzle 0.3mm1 x MK9 Brass Nozzle 0.4mm1 x MK9 Brass Nozzle 0.5mm1 x MK9 Brass Nozzle 0.6mm