Bristan Kitchen Sink Composite Grey Finish Single Bowl Inc Overflow & Waste. Bristan Composite Grey Finish 1 Bowl Kitchen Sink Including Overflow & Waste. Midnight grey matt finish. Suitable for left or right hand application. Made to last: highly durable 80% quartz, anti bacterial composite material. Includes cutting hole template. Includes: strainer waste, overflow, pipework & fixings. 5 year manufacturers guarantee. Limited stock – once they’re gone they’re gone! HS – Outer Hebrides. ZE – Shetland Islands. All courier deliveries are delivered to the front door only.