SimplyCopper 20" Large oval design is a unique design piece, created of 18-gauge copper which is hand-hammered to provide a elegant look.This sink is installed as a vessel. Specs Shape: Oval Outside Dimensions: 20" X 14-1/2" X 5" Center, 7" each end Inside Dimensions: 20" X 14-1/2" X 5" Center, 7" each end Edge (Lip): Wire Rimmed Drain Opening: 1-1/2" { Non-Overflow } Drain Included Design: Hand-Hammered Surface Gauge: 18 Material: Copper Finish: Aged Copper Overflow: No Installation Type: Vessel Warranty: Limited Lifetime Included: (1) Copper Sink (1) Drain Installation Instructions Copper Sink Care Warranty Information Please Note: Each sink is handmade by Skilled Artisans. Our sinks are unique and one of a kind. You will use the sink as your template as dimensions can vary slightly due to the handmade nature. Variations in the patina are normal and not considered to be a defect. We recommend a professional for installation. Use only mild soap and water with a soft cloth for cleaning.