DO NOT Purchase this product unless you are certain you have the OLDER MODEL inlet valves with screw caps, often liken to compression joints where you have to unscrew the top to get to the washer If you have the NEWER Twist lock washer you need a different product Replacement Armitage Shanks product PLEASE NOTE insert colour is all white, this indicates year of manufacture and has no effect of the function of the washer Fits Armitage and Ideal Standard valves size 32mm (1-1/4") DOES NOT FIT NEWER TWIST AND LOCK VALVES