Kraus C-GV-710-12mm-1005ORB Lava Glass Vessel Sink and Riviera Faucet Oil Rubbed Bronze Tempered glass construction Designed for easy above-counter installation Easy-to-clean Polished surface is scratch & stain-resistant Standard 1.75 inch drain opening works with pop-up drains without overflow Brass construction for maximum durability Glass sink is constructed from solid tempered glass Designed for above counter installation with standard US plumbing connections Sink features polished glass interior and exterior Certified and Listed by UPC, cUPC, CSA, IAPMO, ANSI and SCC Limited Lifetime Warranty