We are one of the largest 4A ZEOLITE manufacturer in Southern China.Our 4A Zeolite quality is very high grade,and size is only1-2um,and we obtained many certification,such as ISO9001:2000.In Asia,there are only PQ/USA Co offer same as ours.but you know their price is too higher.Now, Over 80% supply for P&G Asia/Kao JAPAN.They used our zeolite to replace STPP in their detergent powder products for decrease their cost.So you don't worry for our quality.