ALFI brand AB9056 Pop Up Drain for Bathroom Sink with Overflow, Polished Chrome This item is designed for sinks that have an overflow, if you are looking for a drain for sinks that do not have an overflow, choose model AB9055 Solid brass construction coated with a Polished Chrome finish Mushroom pop up drain, allows you to open and close the drain by simply pressing down on the mushroom top. Sleek modern design.