31" Drop-In/Undermount Granite Single Bowl Kitchen Sink in Black Onyx Kraus dual mount 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 basins accommodate large dishes with ease, while the gently rounded corners make sink maintenance simple. Each non-porous, naturally hygienic sink is protected with a thermal finishing process, creating a surface that is highly resistant to heat, chemicals, scratching, chipping, and discoloration. This single bowl sink provides a lifetime of functionality with versatile style. The basin is self rimming, creating a finished look for your kitchen. Choose from easy topmount installation, or install the sink as an undermount for a seamless look. For added convenience, a basket strainer drain assembly and complimentary towel are included free with purchase. Constructed from premium stainless steel, the top-quality basket strainer assembly creates a tight seal to prevent food and debris from clogging the drainpipe. For easy installation, all mounting hardware is provided. Experience Kraus Quality and bring your best kitchen ideas to life. Benefits & Features Constructed from 80% Natural Granite Looks and Feels Like Real Stone Naturally Sound-Absorbing Non-Porous Surface is Hygienic & Heat-Resistant Protected by Thermal Finishing Process Highly Resistant to Heat, Chipping, and Discoloration Extra-Deep Basin Design Standard 3.5" Drain Opening Gently Rounded Corners for Easy Maintenance All Hardware Included for Dual Mounting Options Limited Lifetime Warranty Sink Certifications: CSA B45.5/IAPMO Z124, CSA certified, MASS Approved