Reproduction of the original brake master cylinder for use with 1952-55 Chevrolet and GMC pickup 1/2 ton 3/4 ton and 1 ton truck models. This master cylinder is manufactured to factory specifications for a original appearance. Comes complete and ready to install for a simple replacement. Note: For use with 1955 2nd series (late) models. Applications:1955-59 1/2 ton 3/4 ton & 1 ton Pickup Trucks Application Notes: The 1955 application refers to the 2nd series (late) models.