The Avanity 18 in. rectangular undermount vitreous china sink offers timeless durability and everyday functionality. Polished interior is easy to clean and maintain. Avanity CUM18-R Features: Covered under Avanity’s 1 year limited warranty Constructed of vitreous china Undermount installation Rear drain location increases available space under the sink Equipped with overflow Avanity CUM18-R Specifications: Overall Length: 18-1/8″ (left to right of sink) Overall Width: 13-5/8″ (front to back of sink) Overall Height: 7-5/16″ (top to bottom of sink) Basin Length: 16-1/8″ (left to right of basin) Basin Width: 11-5/8″ (front to back of basin) Basin Depth: 5-7/8″ (top to bottom of basin) Drain Connection Size: 1-13/16″ Number of Faucet Holes: 0