3M floor pads are made to exacting standards and are backed by ongoing innovation and advancements in technology that make them among the most effective pads in the industry! Overall Dimensions: Diameter: 20in Hole Diameter: 3 3/8in Thickness: 1in This pad is compatible with rotary or automatic machines operating at low speeds of 175 - 600 RPM and is recommended for use on your VCT linoleum and sheet vinyl surfaces. Plus this pad is washable reusable and reversible for incredible longevity! Scrub away dirt and scuffs to create a clean surface for burnishing with this 3M 5000 20in TopLine autoscrubber pad! This pad is made of nylon and polyester fibers and has abrasive particles bonded throughout the entire non-woven construction instead of just the surface like some competitive pads.