Fits all JSG Oceana sinks with a 1 3/4'' drain hole Drill a hole in countertop slightly larger than the width of your drain. Apply a thin layer of plumber's putty or clear silicone between the mounting ring and countertop. Place the vessel mounting ring on the countertop. Set the vessel sink on the mounting ring making sure that the rubber washer seal sits flush against the bottom of the vessel and in the mounting ring groove. After use, wipe the vessel mounting ring with a clean soft cloth. To clean, wipe with a damp cloth and dry with a soft cloth. JSG Oceana, a woman-owned U.S. manufacturer, has been producing glass for over 100 years. Our high quality and durable products, created from borosilicate glass, offers many styles and new innovative designs. Available in 16 colorations and 11 models, JSG Oceana glass sinks will certainly complement your upcoming bathroom or kitchen remodel. All JSG Oceana glass sinks are scratch resistant, stain resistant, shatter proof and manufactured directly outside of Pittsburgh, PA. JSG Oceana glass sinks are of superior quality and much more durable than any other sink material on the market. All glass sinks come with a limited lifetime warranty.