Universal brake pump Wilwood with a tank 40 ml. Suitable as a pump for a hydraulic hand brake or clutch. Entry thread: 7/16 "Exit thread: 3/8" The 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. Inlet size: 7/16 "Outlet size: 3/8" Specific dimensions are given in the last photo in the gallery. Wilwood. with a 40ml tank. The exact dimensions are given in the last photo in the gallery. Suitable as a pump for a hydraulic hand brake or clutch. Entry Thread: 7/16 "Exit Thread: 3/8"