Houzer BG-7218 Wirecraft Bottom Grid is made of T304 stainless steel with protective feet. This in-the-sink bottom grid helps to reduce noise while cushioning fragile dishes and protect your sink surface from scratch. It measures 30 1/2" x 15 1/2" and is custom designed to fit Houzer sink models PTG-4318. Houzer BG-7218 comes with a 1-year limited warranty.