High Silica Fiberglass Filter Mesh: ISO9001:2000 Material:galss fibers mesh Size:1.0*1.0,1.2*1.2,1.5*1.5,2*2,2.5*2 ... filter, iron filter, cooper filter, etc. main mesh size: 1.0*1.0, 1.2*1.2, 1.5*1.5, 2*2, 2.5*2.5 ... of bubbles, trapped oxide and other inimical impurities to radically clear the blow hole, slag blister and greatly improve casting yield ...