If you have problems with the installation process, please contact us for an installation video.【MATERIALS AND CRAFTSMANSHIP】This kitchen sink is made of the highest specification 16 gauge 304 stainless steel, the top thickness is 3MM, strong and durable, the whole sink is handmade with nano-crafted treatment, preventing scratches, non-stick grease and dirt, easy to clean. The whole presents a smooth and textured black and gray color, matching your modern kitchen, making your kitchen very neat and tidy.【UNDERMOUNT SINK SIZE】Outside dimensions 31.5" (L) x 17.7" (W) x 9.25" (D). Inside dimensions 29.5" (L) x 13.7" (W) x 9.25" (D). Standard 3.5" undermount spout. Our sinks feature deeper dimensions to ensure that they can accommodate more and larger cookware and utensils. Please make sure it fits your kitchen countertop size before purchasing.【THE FUNCTION OF KITCHEN SINK】The 360° pull-out faucet and its three spray modes, together with the double-slide design on the inside of the sink, allows you to flexibly place mobile cutting boards and draining baskets without taking up counter space, making it more convenient for you to wash dishes and vegetables.【ACCESSORIES】This product comes with the best-selling cup washer on the market, allowing you to quickly clean glass water glasses of all sizes. We also equip an extra small faucet to facilitate extra water environment for customers.【DRAINING DESIGN】Automatic draining design, turn the switch to complete the quick drain, no need to open the drain cover to avoid grease stains sticking to your hands, the bottom of the sink is designed with R10 rounded corners and gently sloped guides for easy cleaning and draining to save you the time used to clean the sink.【QUIET SINK】The bottom of the sink is fitted with a thickened acoustic mat and coated with a noise-reducing coating, which effectively reduces the noise generated when in use. Anti-condensation coating prevents water droplets from condensing, avoiding damage to cabinets due to moisture. We offer a lifetime warranty and top-notch customer service, please contact us if you have any questions. BURCHAIN was founded in 2012, focusing on developing high-quality kitchen sink. Our products are well received by customers for their excellent design and reliable quality. The use of the highest quality stainless steel has the characteristics of heat resistance and corrosion resistance, and the smooth and bright surface formed will make your kitchen more beautiful. SPECIFICATIONS: Material: T304 stainless steel Mounting Type: Drop-in/Topmount Style Type: Single bowl kitchen sink Pattern: Double ledge workstation sink Sink Finish: Black Thickness: 16 gauge Sink Dimensions: 31.5"L*17.7"W*9.25"D Drain Hole Size: 3.5 inch Faucet Hole: Five holes