Metal FITS HOLE DIAMETER 1 5/8 INCH TO 1 29/32 INCH: Our bathroom sink drain fits sink hole diameter 1 5/8 inch to 1 29/32 inch (1.6-inch to 1.92-inch). CAUTION! To avoid costly installation issues due to inadequate sizing, measure existing drain opening or consult sink manufacturer instructions first before placing an order. POP UP DRAIN STOPPER WITHOUT OVERFLOW: It fits for use in most bathroom and vanity sinks without an overflow. Please make sure the gaskets are in the right position to avoid leakage. DURABLE BRASS CONSTRUCTION & MATTE BLACK FINISHED: The pop up drain is made of premium brass material with matte black color, it is durable, not easy to rust. Upgrading your bathroom is easy with our pop up drain, whether your decorating style is traditional or modern. EASY TO OPERATE: Smooth push-button operation with water tight seal. Easy to open and close. The drain stopper is the best solution for a running tap and may help to avoid a home flood. EASY TO INSTALL: Doesn’t need any other device to install this but the own tools you have at home. Installation can be completed in minutes even though you are a girl!