Quartz Classic Perfect Drain Undermount 25 in. Laundry Sink in WhiteElkay Quartz Classic sinks have a smooth surface and a visible depth to their structure. They come in a variety of vibrant UV stable colors that allow you to add an unexpected pop of color to your space. Classic sinks also offer durability to take on tough kitchen tasks. Perfect drain: edgeless drain eliminates the gap around the drain for a cleaner, more hygienic sink, food and gunk go right down the drain Undermount installation: sink is installed