This button is for the Sanindusa dual flush toilet valve. Our product code is ATS108. The button is only for the new style Sanindusa valves with the threaded plastic rod which sticks up and the button activates it.
Commonly found on suites such as Jade, Reflex, City 60, Nau and Pozzi-Ginori.
See below for the Sanindusa flush valve which is compatible.
The button is unbranded but of high quality.