Today we're going to review part number AT85740. These are the Atwood 7 inch left and right hand single servo hydraulic drum brakes, with the black e-coat finish, and a 2500 pound weight capacity. These Atwood trailer brake assembly will act as part of your trailers hydraulic braking system. This part is for a quantity of two. The hydraulic drum brake assemblies are designed for use with surge… see more >