150mm 6" Sanding Disc 40 Grit - Box of 50 SEM Performance Abrasives are specifically designed for today's complex automotive repairs. The abrasive products incorporate "precision grain technology," which provides fast cutting, long life, and a consistent finish on all substrates.Features: id='isPasted'>Film backingSemi-open ceramic blendStandard P grade gritFast cuttingExceptional edge wearConsistent scratch