Part No: POL-EXTR-S-850-HDFull set Extreme Portal Brass Brake Pads for 2011-2021 RZR 800. EXCLUDES Crew Model***ExtremeATVparts Brass Brake Pads are made from high-quality brass, that has been bonded and fastened to a high-quality steel plate backing. We do NOT recommend for prolonged or dry high-speed stopping, along with sustained downhill braking/stopping. Used for off road use only.ExtremeATVparts Brass Brake Pads for portals have 40% more surface for braking along with even better longevity and holding power. These pads are ONLY made for bikes with 6″ or 8″ portals.Please note: ExtremeATVparts products are warrantied to the original purchaser only. Proof of purchase will be required when submitting a warranty. We warranty manufacturing defects only; we do not warranty normal wear and tear.