This is a radio tube OZ-4. Solid state. This item contains a core charge of $15.00 included in the price. Once the exact same part is returned and rebuildable, a refund of thi... For 1937 1938 1939 1940 1941 1942 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 Chevrolet Cars and Trucks