See more: Rear Brake Master Cylinder
Fits the rear brake master cylinder on 1999-2007 Touring, 2000-2017 Dyna & 2000-2017 Softail, Rubber top cover seal, V-Twin Mfg. (OEM 42455-99)
Top cover gaskets and seals can be used with DOT 3, DOT 4 or DOT 5 brake fluid but you should always stay with the same brake fluid type as the three types are chemically incompatible.