12″ x 2″ Left Hand electric complete brake assembly. 6,000-7,000lb capacity per pair. Mounts with 5 bolts (not included). Brakes automatically adjust to deliver optimum performance and braking power. Reduce stopping distances 50 percent more than other brakes. Save time and money. Proper adjustment leads to better brake efficiency. Uses 12″ Hub/Drums.nBolts-7-5 and washers-38LW included.nnThese 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.nISO/TS 16949:2002 certifiednn• Fits standard 6,000lb-7,000lb axle with a 5 bolt pattern on the mounting flange.n• Left Hand(driver’s side)n• Complete assembly ready to bolt on and wiren• For use with a 12″ inside diameter drumn• The shoes are 2″ widen• Self-adjustingn• Mounting hardware includednnTo determine the size of the brake, you need 2 measurements. The first is the diameter of the brake(D). The second is the width of the shoe(W). It is good to take note of how many mounting bolts the brake has.