... % min.Particle Size:D50: 13~18umPacking: in 25 kgs bags,henan kingway have different size,fine, ultra fine, and also coated ... ~90um,50um,25um,20um,14um,10um,5um,2um,1um. HENAN KINGWAY CHEMICALS CO.,LTD.Tel:86-371-65336567,Fax:86-371-65336188 Aluminium ...