2O x 7O scrubbing surface; 65 tufts of 1O long, recycled PET staple-set fibers; 2.5O wide scraper; Resin block shaped and grooved for easy gripping; Fibers are not flagged to withstand heavier debris and varied surfaces The Libman 7 Scrub Brush is the ideal heavy-duty cleaning tool designed to handle the toughest jobs. The stiff, non-flagged fibers and built-in scraper remove heavy debris from cracks and all surface types.