10 in. x 1-1/2 in. NEV-R-ADJUST™ Electric Brake Assy - R.H. / 3k #K23-477-00
Amazon.com: Lippert Forward Self-Adjusting Brake Assembly for Left Side 12" x 2", 3500-7,000 lbs. Capacity, for 14.5", 15", 16" Wheels - 296651 : Automotive
Amazon.com: RUNNINGAXLES Pair of 12-1/4" x 5" 15,000LB Self-Adjusting Electric Trailer Drum Brake Assemblies for 12,000 to 15,000LB Trailer Axles, (1 x Left Hand - 1 x Right Hand) 77-1212-1-2 : Automotive
How to Adjust Your Trailer Brakes | The Ultimate Guide | etrailer.com