AVS 150mm 6″ Sanding Disc 40 Grit – Box of 50SEM Performance Abrasives are specifically designed for todays complex automotive repairs. The abrasive products incorporate precision grain technology, which provides fast cutting, long life, and a consistent finish on all substrates.Features:Film backingSemi-open ceramic blendStandard P grade gritFast cuttingExceptional edge wearConsistent scratchAdvanced Venting System (AVS) Quick Guide (pdf)Brochure (pdf)