Coupling Duofit 3/4" Cylinder Heavy Spring

Suits both 50mm & 1 7/8” Towballs. Suitable for fitment to all types of trailers with hydraulic brakes. This model uses a compression spring for dampening the trailer braking. A hydraulic parking brake is fitted, as is an anti-rattle screw. Provision is made for the fitment of a security padlock. Available with either light or standard duty damper springs. The standard master cylinder has a 3/4” bore but where 4 wheel brakes are fitted, the model fitted with a 7/8”cylinder is recommended. Park Brake Lever can be folded down. Complies with NZ standard 5232-1993 when used in the 50mm mode.