Cheap And Discounts 1Pcs 100mm Diamond Coated Grinding Disc Wheel 20mm Inner Hole Grinding Wheel For Optical Glass/Ceramics/Ferrite/Precious Stones Wholesale. Buy Directly From Merchant LITTLE -HOUSE Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.