Home » Medium Pronto Prep Disc Pads Medium Pronto Prep Disc Pads Specifications Non-woven material impregnated with aluminum oxide grain 2-ply cloth construction Threaded male hub Durable, resists loading Good for flat or contoured surfaces and hard to reach areas Description 2" Medium Prep Disc Pads 3" Medium Prep Disc Pads Item Number BB2M BB3M