Profile: Trantech Radiator Products is engaged in the production of radiators. We are an ISO 9001 certified company. Integral header flexoplate radiator assembly features 3" OD headers, 4" header extensions, 19 gauge plates, powder coat tabs and one coat of polyester powder. Our valves are designed to withstand more than 25 psi and full vacuum, are coated with epoxy primer and shipped complete with NBR O-ring, shipping cover plate, four 3/4" x 2-3/4" grade 5 bolts, nuts & washer.