“Mushroom-tipped” exhaust/intake valves. Probably for a 1930s-1940s Ford flathead engine. Possibly a Model A or Model B. Valve heads are stamped “F Ford I USA”. These valves appear to be unused old stock. Price is for a set of 21 valves.
Head diameter: 1.51” (38.2mm)
Tip diameter: 0.55” (13.9mm)
Shaft diameter: 0.31” (7.9mm)
Length: 4.82” (122.6mm)