Bestter Toilet Rectangular Dual Flush Push Button 33mm X 79mm ATS7620
This high quality Bestter push button is a direct replacement for your current button. Button is 33mm X 79mm for a square hole around 35mmX81mm. Note, the distance between the centers of the actuator rods is 34mm. Rods end around 220mm below the cistern lid but can be cut down to any size shorter than that quite easily.