1.The pop up drain stopper for bathroom sink is made of brass and stainless steel without any plastic parts. Finish ensures that the brushed gold sink drain resists scratches, corrosion and tarnishing, which is rustproof and durable for 10 years or more.2.Composed of explosion-proof, crack-resistant and thickened brass and stainless steel, our sink drain is an integrated body with a 0.4mm thickness pipe wall to avoid water leakage when tightening.3.The thickened silicone gaskets included fit the drain better and are anti-oxidation. With the 3-piece sealing ring design, KES vessel sink drain prevents water leakage more effectively.4.Non-overflow Drain Assembly: This sink drain fits most vessel or undermount sinks with NO overflow. 5.Improved Surface Treatment: to give the faucet an extra protective layer, which ensures that the surface is smooth, doesn't fade, and prevents oxidation. In addition, the protective layer can effectively prevent fingerprints.