The pop up drain stopper for bathroom sink is made of stainless steel.High-quality finish ensures that the pop up sink drain resists scratches,corrosion and tarnishing,which is rustproof and long-lasting.This bathroom drain fits most vessel or undermount sinks with NO overflow.The high-quality thickened silicone gaskets included fit the drain better.With the 3-piece sealing ring design,our vessel sink drain prevents water leakage more effectively,round cap creats a seamless look in your sink.