Beschreibung Optical Endstop Switch Kit is suitable for CNC 3D Printer RepRap Makerbot Prusa Mendel RAMPS. It is a reliable endstop switch solution for any types of 3D printers and other CNC or 3D tools. Tips: System normally need at least three pieces of mechanical endstop. Lieferumfang 1x Opto Endstop Switch with pins cable