Inquiry (采购产品): aluminum oxide or equvilent We are a manufacture of paint pumps. We have a need to conduct testing on our pumps to see how tolernate the valves are to certain size particulates of sand or similar substances. Do you have specifications on the diameters of particulates that are available? We might need to test with diamter sizes of .001".002",.003" and .004". **** Hidden Message ***** pete frank 1770 fernbrook lane plymouth, MN 55447 USA Company: wagner spray tech. Title: test engr Phone: 763-553-7076 E-mail: frankp@wagnerspraytech.com **** Hidden Message ***** frankp@wagnerspraytech.com