Buick O.E.M. factory replacement NON-cogged Fan belt Orignal Belt 545284 was 3/8 x 49.50 in. Replacement was 7/16 x 50.00 in. 1970 - 1971 455 Stg 1 1972 All GS 455 with A.C. ( 72 GS 455 without A.C. is also available ) Fan Belt - $55.00 plus USPS Flat Rate $13.90 = Total $68.90. Check, MO or Paypal Thanks, David