R- Series: Stainless Steel Sinks with 3/4″ Radius Corners. Typically Square Shaped and Reinforced with 16 Gauge Stainless Steel

Under Mount R Series Stainless Steel Sinks Designed for Under-the-Counter-Top Installation. Sink should be installed allowing for a slight over-hang between the natural stone and sink or installed flush with counter-top cut-out so that dimensions of cut-out and the inside dimensions of sink  are exactly the same.