Finally an alternative to the Dexter 12K & 15K hydraulic brake assembly!! This is an Axle-Tek product that fits the Dexter or Lippert 12K-15K trailer axles and the quality is way better than the price! This brake measures 12-1/4" X 5" and has a 7-Bolt mount. Includes dust shield and comes ready to install. This kit includes a right-hand and a left-hand assembly.