3 x 4 in paper backed abrasives hook and loop aluminum-oxide 100 sheets/box SurfPrep's blended paper backing provides for enhanced support of grain and edge-wear, Our premium abrasive grain in an open-coat construction provides a true, consistent and uniform scratch. Innovative 'load-free' coating provides for a fast rate of cut and longer life. The better choice when it comes to preparing a surface for stain however durable, fast cutting and consistent in finish for all surfaces requiring proper prep sanding Italian engineering, design and attention to detail ensures consistent tolerances in the manufacturing of SurfPrep branded paper discs Developed for the operator, shop or manufacturer who struggles with swirl marks while preparing surfaces for stain, provides a true, consistent, uniform finished scratch "B-weight" "calendared paper" backing supports high-quality aluminum-oxide grains in grits P120 to P320. "C weight" grits P80 to P100 Open coat grain distribution across surface of disc to allow for sanded dust evacuation As Long As Material Being Sanded is "Cured". Enhanced Zinc Stearate applied to minimize substrate transfer while "strip sanding" surfaces As Long As Material Being Stripped or Sanded is "Cured" SurfPrep believes "one" excellent paper disc constructed to the highest quality standards is sufficient, keeping decision making easy and simple for the consumer when it comes to prepping surfaces as opposed to multiple varieties (6-8-10 + different sanding discs) of paper backed sanding discs which begins to complicate an easy task such as surface preparation.