Premium all-metal material Our pop-up stopper is made of brass and the tailpiece is stainless steel. Industry-leading finish ensures durability and reliability in daily use Spring-loaded push button Simply pushes the pop-up cap to drain or fill the water. Convenient to turn the upper cap counter-clockwise to unscrew and remove the stopper to clean, will not clog Avoid leaking design Our pop-up sink drain stopper comes with 2 soft silicone gaskets. Please make sure the gaskets are put in the right position (please refer to the product picture or installation instructions) to avoid leaking Fits most overflow sink Designs for lavatory vessels or under-mount sinks with overflow holes. Fits sink hole diameter: 1.65-inch; max. sink thickness: 1.77-inch