Lightweight, space-saving alternative to full size master cylinders. Fits popluar clutch and small brake applications. 3/4-inch bore. 3/8-24 inverted flare fitting included. 1.4 oz. fluid reservoir. 5/16-24 threaded pushrod.The Perfect Solution For Your Hydraulic Clutch ConversionDitching your ancient mechanical clutch linkage provides much needed room for custom exhaust, long tube headers, and more. Even engine swaps can often create issues with trying to reuse the factory clutch pivot linkages, as there is no longer a engine block provision for your clutch linkage. Upgrading to a hydraulic clutch solves all of these issues and provides a better, easier to modulate clutch pedal feel as well!Learn more about selecting the proper master cylinder for your vehicle by reading our Toolbox article on Master Cylinder Bore Size Selection.