|The duofit is designed to fit both, a 1 7/8" and a 50mm, tow ball, at the turn of a handle. This particular coupling is suitable for trailers that have a hydraulic braking system, and trailers that do not exceed a total combined (boat and trailer) mass of 2500kg.
Features include: hydraulic parking brake; light/ standard duty dampner springs, 1" 7/8 (2 braked axles) master cylinder, zinc plated; anti rattle screw; security fitting.
Fitting Measurements: 4 hole- 54.5mm x 182mm (TC 40)
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