Sampler Pack This pack includes 1, 6" X 6" sheet of each of the thickness we keep in stock. A total of 8 sheets: 1 mil (.001" thick) 1.4 mil (.0014" thick) 3 mil (.003" thick) 5 mil (.005" thick)/ 36 gauge 8 mil (.008" thick)/ 32 gauge 10 mil (.010" thick)/ 30 gauge 16 mil (.016" thick)/ 26 gauge 22 mil (.0217" thick)/ 24 gauge.Premium Copper Alloy 110 (99.9% pure copper) Smooth Commercial Finish/Annealed (Soft).