Kraus C-GV-570-12mm-10ORB Callisto Glass Vessel Sink and Waterfall 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 Tempered Glass Construction Designed for Easy Above-Counter Installation Easy-to-Clean Polished Surface is Scratch & Stain-Resistant Standard 1.75" Drain Opening Works w/ Pop-Up Drains w/o Overflow Brass Construction for Maximum Durability