GSI Mini Espresso Cups Inspired by traditional Graniteware, our Enamelware Mini Espresso Cups by GSI blend old-fashioned charm and functionality into one sturdy package. Built from heavy-gauge steel with a classic speckled enamel finish, every piece has been kiln-hardened twice at 1400deg F to stand up to scratches and chipping. Plus, three-ply construction maximizes heat distribution for even cooking. Specifications: Weight: 1.6 oz Material: Enameled Steel Dimensions: 3.5in. x 2.7in. x 2.0in.