We are a largest manufacturer of 4a zeolite powder in mainland china. Our quality of 4a zeolite detergent grade is highest grade, and size is only1-2um. Now, our producsts over 80% supply for p & g / Asia and kao / Japan, and we obtained ISO9001: 2000 and other technology certificate. So you don't worry about our quality. Pls kindly find the attachment. We are glad to cooperate with you in the future. If you are interested our products, pls don't hesitate to contact with me. We would offer the best price to you. We believe you will be satisfied with our quality.