STYLISH® 18 inch Rectangular Undermount Ceramic Bathroom Sink with 2 Overflow Finishes Combining high quality ceramic, ultra resilient craftsmanship, and stain resistant properties, this stunning white porcelain rectangular undermount sink is a beautiful, timeless addition to your home.This bathroom undermount rectangular ceramic porcelain sink features a classic, elegant design that will enhance the look of any bathroom and will free up counter space. The sink's glossy finish makes it easy to clean and guarantees a flawless appearance for years to come. This model comes with a 1 3/4" drain opening designed for standard US and Canadian plumbing connections.