This set of 5 vintage Custard Jello fluted shell metal molds are made from aluminum with a silver color. I cannot confirm their date of manufacture, but some sources say1930s-1950s. The molds have a shell shape with a 2 3/4" diameter and 1 3/4" height, perfect for baking tarts or custards. They are suitable for use in steam, gas, or electric ovens and are easy to clean. This set includes 5 tins that would make a charming addition to any kitchen or dining collection.