Extra Coarse Glass Bead Blast Media, MaBlast Media, Extra Coarse Glass, Extra Coarse Glass Beads Media Kind, Size 53 Lbs, Nominal Dia. Microns Min. 212, Nominal Dia. Microns Max. 300, Nominal Dia. (In.) Min. 0.0083, Nominal Dia. (In.) Max. 0.0117, US Sieve 50-70, For Use With Abrasive Blast Finishing Equipment in Cleaning, Application Deburring, Finishing and Peening, Standards OSHAximum Nominal Diameter 300 Microns, Minimum Nominal Diameter 212 Microns, US Sieve 50-70 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 more difficult the fabric, the deeper media will penetrate and the quicker it is going to work. Spherical form is perfect to be used on soft materials where tolerances will have to be maintained. Incorporates no free silicas and leaves no residue.Extra-Coarse Glass BeadsFor peening applications.