Metals: Aluminum/ Brass/ Copper
Size: 1 inches(25.4mm) * 1.5 inches(38.1mm), 
Thickness: 1.5mm/0.06 Inch/ Approx. 14 ga. 
Protective film:  peelable blue film on both sides to prevent scratches, peel it off before stamping
Retail Packs Options Available:  25PCS/ 50PCS