12″ x 2″ Left Hand electric complete brake assembly. 6,000lb-7,000lb capacity per pair. Mounts with 5 bolts (not included). Uses 12″ Hub/Drums. Bolts-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 axles 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• 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.