This listing is for a new old stock Johnson Controls part number V-4710-601 Valve Diaphragm for 3R 13737 Actuators.  It measures 6 inches in diameter.  Packaging varies.  It was manufactured in USA.

Your satisfaction is guaranteed.  All items are shipped via the US Post Office (USPS).  I make every effort to ship your item within 24 hours following receipt of payment, except for Sundays or Holidays when the post office is closed.  Payments are accepted by Paypal.