The Cygnet Evolution series is hand fabricated from the finest certified 304 18/10 stainless steel. No pressing or stretching is used in the fabrication process. 100% hand fabricated from a hybrid of gauges, each one appropriate for its portion of the sink. These sinks are stronger and heavier than their stretched and pressed 16 gauge counterparts. This gives you the highest quality product and the best value in the sink industry. All sinks are fully undercoated and padded for noise reduction. IAPMO certified UPC and C-UPC compliant.