1.3D printer light control limit switch 2.High-quality switching elements, using PCB material, under normal circumstances the system needs to be equipped with at least 3 mechanical switches, easy to install, more commonly used styles 3.3D printer photoelectric limit switch, compared with mechanical switch, small and compact, sensitive and quiet trigger, high repeat positioning accuracy, no mechanical collision 4.The optical switch is a reliable stop / switch solution for any type of 3D printer / CNC / 3D tool 5.Using optically transmissive principles of design, no loss, no noise with a longer life Product name: 3D printer mechanical limit switch Colour:black Material:PCB+Metal Size:10cm Package Contents: 6*Limit Switch 6*Switch Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.