Model 10 bolt on disc brake hydraulic surge actuator with zinc plated finish for greater corrosion resistance. This model bolts to the top of the trailer frame channel and has a drop down front. Takes a 2-5/16" coupler ball. 12,500 LB capacity, max. GVWR, 1,250 LB pound tongue capacity. Mounts to the top of a 3" wide frame. This surge brake actuator comes with solenoid and cover.