Huiying Chemical Industry(Xiamen) Co.,Ltd 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. Parameter, pls check as below.