Replacement reservoir for type 2 master cylinders and buggy master cylinders. This is the most common unit because it screws onto the master. Old units can begin to leak around the bottom. When installing be sure to use a wrench on the metal thread. Turning with the plastic cup will result in failure. REPLACEMENT SEALING WASHER # N138272 SOLD SEPARATELY Bus Type 2: 58-66 Material: Plastic Quantity: Sold EachBrake Reservoir Type 2 Style Fits Bus 58-66 & Buggy Master