Quarza 31" Single Bowl Black Onyx Granite Undermount Kitchen SinkKraus undermount granite sinks create an instant style upgrade for the kitchen. Constructed from 80% natural granite, with the look and feel of real stone, these modern kitchen sinks look striking in a variety of settings. Clean lines and thoughtful design details highlight the organic elegance of granite, for an eye catching look with contemporary appeal. The extra deep basin on this 31" single bowl undermount sink accommodates large dishes with