Heavyweight durable material has even heat distribution. Highly polished mirror-like finish prevents crusts from sticking to the pan. Doesn't tarnish and wear like aluminum so it always stays looking like new. Can go directly from freezer to the oven without damaging the pan. Measures 9-3/4" wide by 1-1/2" deep Highly polished mirror-like finish prevents crusts from sticking to the pan Doesn’t tarnish and wear like aluminum so it always stays looking like new Can go directly from freezer to the oven without damaging the pan Measures 9-3/4" wide x 1-1/2" deep