Oreck Commercial 237057 Green Tile Scrub Brush easily installs on your Oreck Commercial ORB550MC Orbiter Floor Cleaner Machine (sold seperately) to deep clean tile floors. The 0.015 inch diameter polypropylene bristles can be used in wet or dry conditions to remove heavy dirt and debris and are resistant to stains, odors and wear. The bristles are crimped to reduce clumping and to hold moisture better than straight bristles.