Infinity under-mount convertible sink is a under-mount porcelain sink, with an infinity insert on top of it. Infinity insert when installed, the vanity top would look like it is in the picture. The assembly hide away the sinks and drains from a normal vanity. When the faucet turns on, the water flows onto the rectangular inserts, flows through the gap and down to the basin underneath. It is a Spa like water feature made available for everyday home. Converting that to a regular under-mount is as easy as taking the insert off.