Pirate Mfg Hot Rod Polished Billet Aluminum 16 LB Radiator Cap Brand new polished billet aluminum 16 LB radiator cap These are 3-1/4" total diameter These caps will fit most original radiators as well as all aftermarket aluminum radiators Perfect for your off road, jeep, rock crawler, muscle car, street rod, rat rod, gasser, dune buggy, or sand rail project Sold Each