The revolutionary designed StopShroom universal drain stopper plug fits into any standard sized bathtub or bathroom sink drain for those times you want to take a bath or fill up the sink. For the perfect seal every time， look no further than the revolutionary StopShroom. The lower ring presses just inside the drain， with the larger ring on top seals from the outside， creating an air-tight seal. Stop the water in style with this bathtub stopper and plug the drain for those times that you want to take a bath or simply fill the sink. StopShroom works great in tandem with our TubShroom and SinkShroom Drain Protectors by plugging the drain when the strainers are not in use.Find the STOPSHROOM PLUG 2PK at Ace.