This Creality 3D Halot-Mage (pro) Z Limit Switch is an original replacement part for your 3D printer. The switch is a PCBA module. In addition, it is a photoelectric opto switch module (B). This product is suitable for the Halot-Mage Pro, Halot-Mage and Halot-Mage S 3D printer from Creality 3D.