NEW GIRLING-STYLE ALUMINUM CLUTCH MASTER CYLINDER, 7/8" BORE, GIRLING Brand New Southwest Speed 7/8" Bore Aluminum Clutch Master Cylinder (SWS Part # 290-4121). Includes extra fitting to get to 3/16" line. Smaller, Girling-Type master cylinder | * Lightweight aluminum construction 3/8"-24 Bulb flare female threaded outlet The fitting that goes in this outlet needs to be a bulb flare fitting or at least have a washer so that the connection is sealed. Most sellers don't include this fitting with the master cylinder, but we do! As pictured, you will get the 3/8"-24 Male to 3/16" Female line fitting. This fitting is a bulb flare fitting and it has a washer for extra sealing Fits all popular racing pedals