Mustee 20BT Bar Sink, 15-Inch x 15-Inch, Biscuit Molded using matched metal molds with premium fiberglass blended with special resins for extra strength and durability Extra deep bowl - self-rimming 3-1/2" reinforced drain opening - fits standard basket drain assembly (not included) Connects to standard 1-1/2" P or S trap Stain resistant, semi-gloss, colorfast finish