Undermount Kitchen Sink with Overflow Hole Black Granite Single Bowl Waste Kit. The sink is made of granite, making it heat resistant, stretch and impact resistant and easy to clean. A Waste kit is also included for. The drainer hole is 90mm in diameter, this kitchen sink is suitable for about and undermounting. Is extremely hygienic and easy to clean with household cleaning products and soapy water. BLACK LARGE GRANITE SINK. Material: 80%Quartz+20%Food Grade Resin. Guarantee: 5 Years Guarantee on Manufacturing Defects. Waste: 90mm Waste Hole. Sink Size: (Width) 550mm x Length 450mm x (Depth) 200mm. Bowl Size: (Width) 500mm x (Length) 400mm x (Depth) 200mm. Free Strainer Waste, overflow pipe Included. Please make sure the return item is in pristine condition with its original box and packaging without broken. If you have been unfortunate enough to have your parcel arrives damaged then it is important to act quickly. If your parcel arrives damaged then you need to keep/retain all of the original packaging and all content intact, submit your claim within 14 days of receiving the parcel, then follow our instruction to return the parcel by dropping it off at your local post office. Your claim will need to be accompanied by photos of the item as well as of the external and internal packaging itself.