Hammer Stahl 14" x 17" Cookie Sheet, Stainless Steel Large heavy-duty 304 (18/10) stainless steel cookie sheet Features easy to grip edges, and open end for smooth release Designed to last a lifetime - our lifetime warranty protects against chipping, cracking, peeling, rust or breakage Stainless Steel is the safest, most sanitary cooking surface available Professional heavy gauge .9mm thickness