This is a vintage Wilton Topsy Turvy Cake Pan from 2004, model #2105-4946. It is a one-piece aluminum cake pan with a silver color and a unique shape for creating topsy turvy cakes. The pan is oven safe and dishwasher safe, with a size of 12" in length, 11" in width, and 2" in height. It is designed for creating special birthday or wedding cakes.