Cheap And Discounts WS2 Smering Poeder 99.9% Tungsten Disulfide Voor R & D Ultrafijne Nano Poeders 0.1 0.5 1 Micro Meter Cas: 12138-09-9 Wholesale. Buy Directly From Merchant An Ant Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.