This listing is for one Dexter 12-1/4" x 3-3/8" 8,000lb-9,000lb (with a 4 bolt flange) Left hand electric brake. Self-adjusting design keeps shoes properly aligned for longer-lasting brake that requires less maintenance. Axle bore diameter: 3-7/8 Mounts with 4 bolts (not included). » Was redesigned with forward self-adjusting feature in June 1996.» Was redesigned with a cast backing plate in May 2000 replacing the stamped version. Fits Dexter 8,000lb-9,000lb axles(with cast backing and 4 bolt flange). For use with a 12 1/4" inside diameter and 3 3/8" deep drum. Left hand(driver's side).
Complete assembly ready to install. To 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.