regalmix bathroom sink drain, vessel sink pop up drain with detachable basket stopper,sink drain assembly without overflow brushed nickel, anti-explosion and anti-clogging drain strainer, rwf082b regalmix bathroom sink drain<br> bathroom sink drain, design precision simple. this is a push-button style drain; simply press the top of the pop-up to close, and another press to open. easy to install, smooth push-button operation. spring mechanism keep the water seal, not to leaking