Call (888) 324-1617 or (541) 912-1333 A rear metal clad seal for a Buick Dynaflow for the years 1948 1949 1950 1951 & 1952. It is also known as a torque tube rear seal. The measurements are 1 7/8" OD, 1 3/8" ID, and 1/4" thick. For questions or to place an order by phone, please call our solutions desk at (888) 324-1617 or (541) 912-1333 8AM-6PM PST (West Coast USA). Or Email us at austincreek@hotmail.com