502074 Flapper replacement.
Once the correct part number was located on manufacturers website, spare ordered on Ebay.
Arrived quickly in manufacturers packaging with instructions. Fitted in five minutes. No tools needed. Works perfectly. I would recommend Fluidmaster flush valves, simple and reliable. Needs no additional overflow pipe from tank. Unlike some valves, flush volume can be controlled by handle (or button) once you get the feel of the unit.
Verified purchase: YesCondition: New