FITS US STANDARD SIZE: Apply to standard bathroom undermount sinks or vessel sinks that WITH OVERFLOW, drain hole diameter required: 1-1/2" to 1-3/4 inch (1.46" to 1.97"). CAUTION! For ultimate functionality and a proper fit, please check and measure the hole size of your basin. NO MORE CLOGGING: The pop-up drain assembly comes with strainer basket inside for collecting hair, jewelry or sundries, prevent the drain pipe from clogging; when it's time to clean up, simply take the strainer out, wipe it off. DURABLE SOLID CONSTRUCTION: Our bathroom sink drain stopper consists of SUS304 stainless steel material which is anti-explosion and anti-cracking; the brushed nickel finish with exquisite lines, resist daily scratches and discoloration. EASY TO USE & CLEAN: Push-down design makes the OTOmitra pop up drain stopper convenient to use. Just press the top cap down gently to keep water and press again to drain off water. And you can unscrew the top of drain stopper to clean hair waste inside easily. EASY TO INSTALL: With manual and a wrench, the sink drain assembly can be quickly installed. Please make sure the gaskets are in the correct position to avoid leaks. You can install this sink drain assembly freehand, no plumber required.