Universal brake pump Wilwood with a tank 40 ml. Suitable as a pump for a hydraulic hand brake or clutch. Exit thread: 3/8 "Exact dimensions are given in the last photo in the gallery. Remote Reservoir Compact Master Cylinders are the perfect solution for club sport racers, small open wheel cars, or any other custom application where there is limited space for the master cylinder and fluid reservoir.This cylinders have a 40ml reservoir for fluid.Suitable as a hydraulic hand brake pump or clutch. Outlet size: 3/8 "Specific dimensions are given in the last photo in the gallery. Wilwood universal brake pump with 40ml reservoir. Suitable as a pump for a hydraulic hand brake or clutch. The exact dimensions are given in the last photo in the gallery. Exit thread: 3/8 "