Description Chrome-plated Single Flush Button for Toilet, Ratchet (38-mm) NuFlush 38mm ratchet flush button is designed to mount on top of toilet tank The button features one button push control that has a ratchet to lift flapper Release the water in toilet tank by a top button ratchet Top buttons can change your toilet from a dual flush to a standard flushing toilet You can get rid of the dual flush top button and convert to a traditional flush Standard flush valves assemblies are less expensive than canister dual flush valves Standard valve assemblies will flush better than dual flush valves one time Flush one time for a bigger and stronger flush and keep your toilet cleaner How to Choose the Right Size Button for Your Toilet- Video