The mid-size 18 in. counter-rotating brush machine in the DAPPER lineup - bigger coverage than the 14 in. compact unit, more maneuverable than the 22 in. wide-format model. Two 15.5 in. counter-rotating polypropylene brushes spin at 450 RPM in opposing directions, lifting embedded dirt, sand, hair, and grit from carpet fibers in a single low-moisture pass. A true multi-surface CRB: works on commercial carpet, tile, grout, vinyl, sealed concrete, rubber gym flooring, and sealed-stone retail surfaces. Janitorial crews use it for routine maintenance of hotel hallways, office carpets, restaurant dining floors, school commons, and convention center carpets. Restoration teams use it as a pre-extraction agitation pass - lifting sand and pet hair before the hot-water extractor goes in - and as a faster dry-clean option when same-day-occupancy is required. Dry-compound capable: the 4.3 in. brush diameter scrubs powder cleaning agents into the carpet pile for low-moisture, fast-drying routes. Safe on wool, loop, cut pile, and commercial-grade dense (CGD) carpets - aggressive enough to lift soil, gentle enough to avoid pile distortion or chemical residue buildup. Edge-to-edge cleaning reaches within 0.8 in. of walls, so the 18 in. cleaning path delivers near-full coverage along baseboards in a single pass. At 51 lbs. the machine is heavy enough for solid downward pressure and light enough to maneuver across a full shift without operator fatigue. Backed by the DAPPER 1-year warranty.