Oreck Commercial 237047 Orange Tile and Resilient Floor Scrub Brush easily installs on your Oreck Commercial ORB550MC Orbiter Floor Cleaner Machine (sold separately) to clean smooth textures, painted concrete floors, and other scratch-resistant, high-traffic floors. The 0.028 inch diameter polypropylene bristles can be used in wet or dry conditions to remove heavy dirt and debris and are resistant to stains, and wear. The bristles are crimped to reduce clumping and to hold moisture better than straight bristles