Q Minerals (Xinyi) is a professional manufacturer of Fused Silica (Grains & Powder) and Crystalline Silica ( Sand & Powder) , which are widely used as materials for Investment Casting , Refractory , Ceramics , Artificial Marble , Epoxy Molding Compound (EMC filler), Paints, Coating, Foundry industries etc. Our products includes : 1. Fused Silica Grains / Fused Micro Silica Powder SiO2: 99.9%min Fe2O3 : 15ppm max -50ppm max, Particle size: A : 3-100mm , 5-50mm,8-5mm ,5-3mm , 3-1mm ,1-0.5mm , 0-0.5mm , 0.5-0.2mm , 0.2-0.1mm , 0.5-1mm B : - 4+10mesh ,-10+20 mesh , -10+30 mesh , -30+50 mesh , -50+100mesh ,-120F ,-325F, -400F,-600F or in accordance with customer's request . 2. Crystalline Silica Sands / Crystalline Micro Silica Powder SiO2 : 99.5% min-99.98%min Fe2O3 : 5ppm max-30ppm max, Particle size: 2-4mesh , 4-6mesh , 6-10 mesh , 10-20 mesh , 20-40 mesh , 40-80mesh ,80-200mesh ,-100mesh , -200mesh , -325mesh , 400mesh , 600 mesh If you are interested in our products , please kindly let us know your requests , sincerely wish we could cooperate each other !