Replace your old and rusty radiator flanges with these RUSTPROOF decorative radiator flanges that comes in a pack of 6. Their beautiful black powder coating prevents rusting and maintains a rich luster for years to come. Easy to assemble. Just snap-in both pieces together around the radiator pipe. These measures 3 in. O.D and 1 1/4 in. I.D. Upgrade your radiator flanges today. Item ID 27435.