12-1/4" x 5" 12K-15K (7 bolt flange) Right hand & left hand electric brakes. Complete assemblies. Features: Self-adjusting design keeps shoes properly aligned for longer-lasting brake that requires less maintenance. Mounts with 7 bolts (not included). These components have passed the CSA Standard CAN3-D313-M85 For Trailer Running Gear, a stringent standard mandated by the Government to assure brake effectiveness and structural integrity of the components. ISO/TS 16949:2002 certified. Was redesigned with forward self-adjusting feature in June 1996. Was redesigned with a cast backing plate in May 2000 replacing the stamped version.