Radiator cap, large dia as original for DB2 to DB MkIII models (not screw on cap), with 4lbs blow off pressure, Stainless body rather than the usual plated body - looks like chrome

Also available in 7lbs to suit DB4 to DB6 Mk2, 10lbs to suit DBS 6 & 13lbs if needed & plain for header tanks or non perssurised rads.