Cheap And Discounts 1PCS ROKO SN04-N Non-contact Photoelectric Zero Position Close Limited Homing Switch for Slide Platform CNC Engraving Machine Wholesale. Buy Directly From Merchant YOOCNC Router & Engraving machine Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.