This dual flush valve seal and clip from FixTheBog is a replacement part for Ideal Standard SV01967. It is approximately 70mm wide with a 25mm hole, though the existing seal may have changed. This product can help diagnose flush valve issues. If water is running into the toilet pan continuously, turn off the water supply. If the cistern empties within an hour, the problem is with the flush valve seal or the flush valve itself. If the cistern does not empty, the inlet/fill valve is likely faulty. Please note that the design may vary in terms of the washer color (black or white).