1928-1929 Ford Chrome Radiator Cap. It is ok for you to let off steam but not your radiator cap! This will cure half the problem. It is SHOW QUALITY stainless steel. It measures about 2 1/2" OD and 7/8" tall.1928-1929 Ford Chrome Radiator CapSKU: KNS-KA4401$22.99PriceExcluding Sales TaxOut of Stock