Each piece of Pro Series Bakeware is made from premium 3003 alloy and is anodized.This anodizing process hardens and seals the surface producing an attractive, smooth and safe finish. Commercial quality bakeware Straight sides – even thickness Guaranteed for 25 years – Will Not Rust, Blister Chip or Warp Handwash only Guarantee: 25 YEAR – Will Not Rust, Blister, Chip or WarpBrand: Mondo Pro SeriesSize: 8in/20x10cm