How are you, We are Q Minerals (xinyi) co., ltdWe are a main Fused Silica(Grains & powder) manufacturer in China, Our market is mainly in Japan , Korea and Europe. our products mainly used as materials or fillers for EMC(electronic), Technical High Temperature Ceramic, Precise Casting and Refractory industries. Fused Silica(Quartz) Grains/ Powder Particle size:A : 5-50mm, 0-0.5mm , 0.5-0.2mm , 0.2-0.1mm , 0.5-1mm B:-4+10mesh ,-10+20mesh , -20+50mesh , -30+50mesh , -50+100mesh ,-120F ,-200F , -325F, -400F,-600F.800For in accordance with customer's request .For more details , please contact us .