4 layer Hard-anodized coating - make it heat evenly, good to bake a pretty popover; easy to release, but not non-stick coating. 6Pcs jumbo individual popover pan mold - made of high quality enduring aluminium with smooth surface, non-toxic and odorless; item size: Top Dia: 3.34"/8.5cm, Bottom Dia: 2.87"/7.3cm, H: 1"/5.1cm.