... 400mesh packing: 50kg 1000kg usage:abrasive, leather,water treatment,feed.ceramic,mgo board,refracto mgo : 60-95% size:120-400mesh packing: ... 50kg 1000kg usage:abrasive, leather,water treatment,feed.ceramic,mgo board,refractoryoff white color, 120mesh to 400 mesh powder . mgo ... industry : abrasive stone, leather tanning,water treatment,feed additive .ceramic,mgo board,refractory material