3M 03210 Clean Sand System The 3M Clean Sand System is designed to eliminate dust while sanding, resulting in a cleaner repair and less cleanup This Versatile solution is great for automotive projects and other sanding projects, like marine and home improvement repairs (Including dent, rust, fiberglass, drywall, and wood repairs) Can be used on metal, fiberglass, drywall, wood, various fillers and more Includes (1) Clean Sand Block, 8 of flexible hose, and (1) vacuum adaptor which fits vacuums hoses from 1.25 to 2.5 Use during Stage 1, 3 and 4 as part of the 3M Body Repair System