Dexter 10" x 2-1/4" Right Hand electric complete brake assembly.  3,500lb capacity per pair.  Mounts with 4 bolts (included), bolts are 2-7/8" apart, center to center. Uses 10" Hub/Drums. 
Nuts-6-17 and washers-5-8 sold separately.
 
• Fits standard 3500lb axle with a 4 bolt pattern on the mounting flange.
• Right Hand(passenger's side)
• Complete assembly ready to bolt on and wire
• For use with a 10" inside diameter drum
• The shoes are 2 1/4" wide