The XR-84 by UFP, replacement inner member slide for tandem axle hydraulic disc brakes, fits into existing outer member housings and includes an electrical reverse lock-out solenoid, that allows you to back-up without your trailer brakes engaging.
Rated Capacity: 8400 lb
Ball Size: 2 in
Brake Lock-Out: Yes, there is an electrical reverse lock-out solenoid installed.
Breakaway Cable: Yes, Included.
Frame Width: 3 in