Cahaba 37 in. x 22 in. Black Granite Vanity Top with a Single White Oval BasinTransform your bathroom with our 37 in. x 22 in. Black Granite Single Basin Vanity Top . Perfect for remodels or new construction, the top comes pre-assembled and ready to install. Fits directly on most standard 36 in. vanity cabinets. Give your bathroom that stylish, finishing touch.