Cheap And Discounts Inductive Sensor ND4-S3-S1-M8 ND4-S3-S2-M8 ND4-S3-S4-M8S8 ND4-S3S1-M12S Proximity Switch Sensor Wholesale. Buy Directly From Merchant BSS Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.