Heavy-gauge steel provides even and gentle heat distribution for consistent browning and baking. Nonstick interior coating eliminates the need for flouring oans, resulting in baked goods with a smooth crumb. It also allows for quick and easy cleaning, and provides many years of nonstick use at an affordable price. dark exterior absorbs heat, providing excellent heat distribution for better browning and shorter baking times. Lifetine warranty on springform buckles. Glass bottom springform w/serving base.