Premier Copper Products PVRDW18 18-Inch Premium Blooming Vessel Hammered Copper Sink, Oil Rubbed Bronze Uncompromising quality, beauty and functionality Inner dimensions measure 13-Inch by 4.5-Inch, outer 18-Inch by 4.5-Inch Copper material gauge: industry best (17-Guage or 0.0450-Inch) Drain size is 1.5-Inch, non-overflow Handmade, 100-Percent recyclable and made of 99.7-Percent pure recycled copper