【Standard Size Fits Most Sinks With Overflow】This matte black sink pop up drain is with overflow. Size of pop up drain assembly for bathroom sink: Diameter of bottom pipe: 1.24”(31.6mm), diameter of the top flange is 22.1”(56mm). Ideal for any above-counter vessel sink with overflow. 2 pack black pop up drain stopper is great for long time use. 【Superior Finish Anti-corrosion & Rust-resistant】This standard sink drain stopper is made of high quality ABS material with oil rubbed bronze finished. Black bathroom sink drain is of high quality construction for anti-tarnish, scratch-prevention and corrosion-resistant. 【Quick and Tool-less Installation】Drain pop up stopper includes all required gaskets, seals and brass mounting nut. Please put all the components in the right place to avoid leakage. 【Push and Seal Pop up Drain with Overflow】Push & Seal's advanced compression lock seals the drain completely. Functional replacement sink drain for the traditional pull mechanism, simply press the stopper to seal or drain the water. 【Leak-proof Water】Vanity sink pop up drain stopper with overflow include the gasket and washer.  Rubber gasket for better tight seal and no water leaking.