Shimano BR-MT805 XC Disc Brake Caliper - Rear Flat Mount 2-Piston Includes K04S Metal PadsShimano BR MT805 XC Disc Brake Caliper Rear Flat Mount 2 Piston Includes K04S Metal Pads. Upgrade your flat mount XC bike with the new two piston Shimano BR MT805 brake caliper with an appearance matched with XTR XT. Easily update your flat mount equipped XC bike with the BR MT805 2 piston caliper BR MT805 caliper is optimized for use with XTR BL M9200 and BL M9220 lever (lever sold separately) Compatible with Shimanos new low viscosity mineral oil