Blast Media, Fine Glass, Fine Glass Beads Media Kind, Size 53 Lbs, Nominal Dia. Microns Min. 90, Nominal Dia. Microns Max. 150, Nominal Dia. (In.) Min. 0.0035, Nominal Dia. (In.) Max. 0.0059, US Sieve one hundred-170, For Use With Abrasive Blast Finishing Equipment in Cleaning, Application Deburring, Finishing and Peening, Standards OSHA Fine Glass BeadsFast cleaning with matte finish.Blast MediaFor cleaning, deburring, finishing, and peening applications. Round, smooth media leaves a peen finish. Sharp, jagged media leaves an etched or matte finish. The tougher the fabric, the deeper media will penetrate and the quicker it’s going to work. Spherical shape is perfect to be used on soft materials where tolerances should be maintained. Comprises no free silicas and leaves no residue.