This is an explosion proof 17 inch scrubbing brush that is made of a natural fiber. It fits on the bottom of our 17 inch explosion proof floor buffer, and will make it possible to scrub any type of flooring in any Class 1 hazardous locations. A 17 inch explosion proof polishing brush, and a 17 inch explosion proof Beryllium Bronze heavy duty scrubbing brush, are also available for the above machine. For other scrubbing options, take a look at our complete line of rotary floor scrubbing brushes. Refills also available, please call for special pricing!