5/8"x3/16" Rectangular tag aluminum premium stamping blank. ImpressArt Premium Stamping Blanks feature smooth, rounded edges, a brighter finish, and thicker gauges. These thicker blanks allow for more metal to be displaced when stamping, resulting in deeper impressions. Premium Stamping Blanks look and feel substantial and will elevate your finished pieces. Use an Enamel Marker to fill in your designs and clean with a polishing cloth. 16 gauge.