VIGO Sheer Black Glass Vessel Bathroom Sink Solid tempered glass construction, scratch-resistant Diameter: 16.5-in., Height: 6-in., Glass thickness: .5-in. Handmade with possible unique and slight color variations, so no two are identical Non-porous surface prevents discoloration and fading, stain-resistant, easy-to-clean surface Polished glass interior and exterior Above-counter installation, 1.75-in. standard drain opening cUPC certified, ADA Compliant, Limited Lifetime Warranty