This Jones Stephens D7021BN is a lavatory grid drain that features an 18-gauge-thick material which will assure you of its toughness and durability over a long period of time. Also, the 8-inch tailpiece is made of solid brass which is resistant to rust and corrosion. It has an opening that measures 1-1/4 inches (OD). All metal parts of this drain are covered by its brushed nickel finish, including the lock nut and the tailpiece. This drain will fit with sinks that have a 1-1/2-inch drain hole. Its 4-inch drain body comes threaded from top to bottom. To complete the installation, washers, made of silicone for a watertight seal, are also included in the package. This D7021BN lavatory drain does have overflow holes. Jones Stephens takes pride in providing their customers with quality products that are dependable and applicable for all of those who use them. These replacement parts and accessories are developed to both perform and to last. Together with Jones Stephens, we, at PlumbersStock, are determined to provide reliable products, like this one, that will meet your needs without costing a fortune.