IMPRESS ART-Metal Stamping Blanks. These metal blanks are designed with the jewelry maker in mind, but can be used by any crafter looking to add metal elements to their projects. They come in a wide variety of shapes and each shape is available in either brass, copper, or nickel silver (all sold separately). All pieces are 24 gauge. This package contains two 3/4 inch diameter circles. Color: Nickel Silver. Imported.