This is an NOS Heater Blower Fan Kit # 3905776 for the following: 1962 and 1963 Chevy II Nova w/o AC, 1964 thru 1966 Chevelle w/o AC, 1965 thru 1968 Impala, Caprice, and BelAir with AC, 1967 and 1968 Chevy II Nova, Chevelle, and Camaro with AC, 1969 All with AC, and 1970 and 1971 Impala, Caprice, and BelAir, Nova, and Chevelle with AC. Note: This is a plastic squirrel cage fan not the metal used on earlier models. Dimensions are 5 5/8" diameter X 2 3/4" height. See Pictures