Sink is handcrafted by artisans in Mexico; Not machine stamped Copper is one of the most hygienic materials you can have in your home Made from 99.7% Pure Recycled Copper Lead Free (less than .01%) Limited Lifetime Warranty Compatible drains (not included): D-207ORB (grid style), D-208ORB (pop-up). Drain opening: 1.5" non-overflow