Brown Fused Alumina 1,with bauxite as raw materials 2,one of the most basic abrasives 3,widely used ... bronze,etc.In addition,they are also used as refractory materials,chemical additive,precision founding and anti-sliding materrials. Code Grit ... 3.90 1.5~1.95 1800~2200 come from china HDLL 90% Brown Fused Alumina