2 Exhaust valves AElite For: Head diameter: 23.8mm Stem diameter: 6.96mm Dimensions are given by the AElite catalog. There may be very slight oxidation on the valve head due to storage for 40 years. The packaging may have suffered over time. Ref AElite: SO 0596-3 Piece new and vintage! Payment by check from a French bank or by Paypal. Payment expected maximum 7 days after purchasing the item! Packaging and postage costs include the actual Post Office rate as well as packaging and handling (cardboard, bubble envelope, bubble wrap, polystyrene, tape). Shipping costs will be reduced for multiple purchases after receipt of your request by email to group your transactions. Possibility of being refunded within 7 days of receipt if the item does not suit you. Return shipping costs remain your res.