These 3300N Niagara Pads remove marks and scuffs while polishing. Use these pads for buffing or limited spray cleaning on harder finishes and high-traffic conditions. For best gloss, they are made of natural and polyester fibers in a nonwoven web with resins bonded to the web structure. Fibers throughout this floor pad are permeated with high-quality resins to deliver high performance over the life of the pad. Open construction resists clogging and washes out easily for long pad life. Designed for machine speeds from 1500 to 3000 RPM, pad provides excellent results for buffing, burnishing and polishing on a wide variety of floor finishes and traffic conditions. Center hole diameter is 3-3/8".