Floor Machine Brush Application Scrubbing Fits Machine Size 40 in 42 in 4 1/2 ft 4 5/8 ft Shape Cylindrical Material Polypropylene Bristle Material Polypropylene Bristle Color Black Brush Diameter 12 in Block Size 40 in Compatible with Manufacturer Part Number M20 T20 Features Parts are Machine Specific Tennanttrue(R) Brushes are Designed Uniquely for Tennant Nobles Machines Includes (2) Brushes