Blast Media, Ground Glass, Ground Glass Media Kind, Size 53 Lbs, Nominal Dia. Microns Min. 425, Nominal Dia. Microns Max. 710, Nominal Dia. (In.) Min. 0.0165, Nominal Dia. (In.) Max. 0.0278, US Sieve 25-40, For Use With Abrasive Blast Finishing Equipment in Cleaning, Application Deburring, Finishing and Peening, Standards OSHA 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 speedier it’ll work. Spherical shape is perfect to be used on soft materials where tolerances will have to be maintained. Accommodates no free silicas and leaves no residue.Ground GlassRapid cleaning for a rougher profile. Gets rid of rust, paint, and scale. Nonrecyclable.