Cheap And Discounts M2.5 M3 M4 M5 M6 Brass Flat Gasket Copper Crush Sealing Washer Flat Seal Gasket Ring Thickness 0.4mm-1.2mm Wholesale. Buy Directly From Merchant Topsen Devices Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.