12″ Nylon grit – rough surfaces. 0.040″ Bristle diameter x 80 crimped grit silicon carbide. There are aggressive particles imbedded in the bristles. In particular, it can be used on asphalt. Only be used on heavy-duty jobs. For 550MC orbiter floor machine.
Oreck Commercial 237.056 Rough Surface Orbiter Brush, 12″ Diameter, 0.040″ Bristle Diameter, 80 Crimped Grit Silicon Carbide, For 550MC Orbiter Floor Machine Review