High grade steel with rigid rolled edges for strength and durability and superior double layer non-stick on all surfaces. The non-stick surface is dishwasher safe and have a stellar lifetime guarantee with a 5 year non-stick guarantee. Sleeved with a James Martin’s special recipe on the reverse to start you off using your tray. Size: 43 x 29 x 2cm (17 x 11½ x ¾)