This is a Pair of New Original GM Rear Axle Retainer Washers GM# 1317183 for Several 1930-1955 Buick Applications Including 1930 30 Series, 1931-1933 50 Series,1934-1935 40 and 50 Series, 1936 40 Series, 1937-1939 40 and 60 Series, 1940-1955 All Except 80 and 90 Series. These are from a Former Buick Dealership Parts Stock. The Washers Do Have Some Cosmetic Rust Age Spotting, but Cosmetic Only. Genuine Vintage GM Still with the Vintage Buick Package. FREE SHIPPING IN THE US.