This is a set of four brand new gas tank main & reserve petcock tap to gas tank flat and Dowty sealing washer. Inside diameter 1/2 inch.
Part number: 70-7351, 82-8198, 06-5329, 00-0183, 70-6961 Dowty seal washer(quantity of 2)
83-0002, F10002 Flat washer(quantity of 2)
Fits: Most Triumph 250cc, 500cc, 650cc, 750cc single and twins. Norton Commando, BSA, AJS and Matchless.