Stainless Steel Kitchen Sink Single Double Bowl Drainer Waste Kit Handmade Basin December 26, 2023 | Comments Off High Quality Square Stainless Steel Kitchen Sink Bowl. Ideal for kitchen sink units. 520 380 190mm (35mm tap hole, with Waste Pipe). 550 450 190mm (35mm tap hole, with Waste Pipe). 600 450 210mm (35mm tap hole, with Waste Pipe).