Combine quality and graceful design with a unique scalloped, clear grey glass vessel from Novatto and you have the Rettangolare. Constructed of thick, 1/2 in., clear grey, high-tempered glass, the Rettangolare vessel sink has a look of classic understated elegance. Made with the highest standards of quality and creative design, Novatto sinks add art and function to any bath or powder room.As an industry leader in glass vessels, Novatto uses advanced technology to produce beautiful glass vessel sinks with unmatched structural integrity and longevity. Internal testing has found this vessel sink to be very durable and forgiving.Standard 1.75 in. drain opening. Included w/ the sink: a Novatto pop-up drain with matching mounting ring and drain assembly. The drain is 8.5 in. high (when closed) w/ a 1.25 in. tailpipe at the bottom. Mounting ring measures 3 in. in diameter by 3/8 in. high; the ring is to be installed between the vessel sink's bottom and the top of the counter. Faucet NOT included.For best cleaning results, a soft cloth with mild soap and water or a non-abrasive glass cleaner, like Novatto's Glacier Ice, is recommended.