Sampler Pack This pack includes 2, 6" X 6" sheet of each of the following, for a total of 6 sheets: 5 mil (.005" thick)/ 36 gauge 10 mil (.010" thick)/ 30 gauge 16 mil (.016" thick)/ 26 gauge. Premium Copper Alloy 110 (99.9% pure copper) Smooth Commercial Finish/Annealed (Soft).