Recycled Glass Abrasives, 20x46 Medium, 15 lbs. DOES NOT CONTAIN HEAVY METALS only 100% recycled post-consumer crushed glass as a sandblasting media Increased visibility & productivity when sandblasting due to translucent dust created Faster removal of coatings when sandblasting from the cubic shape of the crushed glass Delivers whiter finish from significantly reduced embedment compared to slag SILICA FREE & CARB APPROVED for outdoor sandblasting-near/around environmentally sensitive areas