This vessel is one of Novatto's finest. Constructed of high tempered glass in a unique shape, this vessel has a blue foil-painted bottom. Novatto uses advanced technology to produce beautiful glass vessel sinks with unmatched structural integrity and longevity. Constructed of thick 1/2 inch clear high tempered glass, this blue vessel sink will add a punch of cool blue color to your decor. Internal testing has found these vessel sinks to be very durable and forgiving. Tempered glass cannot be compared to everyday synthetic porcelain and ceramics. Internal testing has found these vessels to be very durable and forgiving. Made with the highest standards of quality and creative design, Novatto sinks add art and function to any bath or powder room. Standard 1.75-inch drain opening. Suggested matching Novatto mounting rings: MR-001ORB (oil rubbed bronze), MR-001BN (brushed nickel), MR-001CH (chrome). In-house testing has found these glass vessels to be very durable and forgiving. For best cleaning results, a soft cloth with mild soap and water or a non-abrasive glass cleaner is recommended. Supreme packaging and boxing ensure damage-free delivery.