YIDA Stainless Steel Hand Made Kitchen SinkProduct Description YIDA sanitary ware companywhich has beeninsistingon strict quality,andbelievesin "the devil is in the details”. With perfect laboratory and intelligent testing equipment, all productshave been thoroughly tested and have undergone very strict quality and durability filters. YIDA's products have passedAustralia(WM)quality certification,Saudi Arabia SASO, Nigeria SONCAP, ISO9001:2000quality management system certification and American UPC certification, etc.