The double ended handbrake master cylinder as used in our Group N Hydraulic handbrake assembly supplied as a separate item for custom installations. It has a 19mm bore and each piston has 12mm of available stroke. All fluid ports are M10 x 1.0 and the two push rods are threaded M10 x 1.5. Theses double ended cylinders are offered to allow the actuation of both calipers in installations where the O.E. dual line brake system has separate lines going to each rear wheel.