As an industry leader, Novatto uses advanced technology to produce unique glass vessel sinks with unmatched structural integrity and longevity. Constructed of thick 3/4" high tempered glass, the Pallina is a best-selling round glass vessel sink with a beautiful marbled black and white double-layer design. The design is layered between the glass to ensure beauty for years to come. 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 at an affordable price. Pallina has a standard 1.75-inch drain opening. The set includes a matte black pop-up drain and matching mounting ring. For best cleaning results, apply Glacier Ice as recommended. Novatto's Glacier Ice wipe-on treatment is a hydrophobic sealer used on glass, ceramics and faucets. Apply just once a year to keep your sink or faucet looking like new. Package includes an eco-friendly presoaked wipe-on cloth and one microfiber cleaning towel. Cloth is presoaked enough for multiple applications. Glacier Ice works by sealing the microscopic pores of the silica in glass and ceramics.