This Demco replacement master cylinder for disc brakes outfits all hydraulic surge actuators in the demco line up. This part #5650 is specifically for the Demco Disc brake actuators. This listing includes everything pictured. This master cylinder is manufacturer to be extremely corrosion resistance, made from glass reinforced nylon composite, ideal for freshwater and saltwater use. This master cylinder is a replacement for Models: DA66B, DA75, DA86, DA91, DA10, DA16, and DA20 for disc brakes.