.010″ is made of brass, others are made of hardened alloy steel.
Each blade is marked with inch/metric size.
32 Leaves from .0015″ to .035″
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3M 07385, Scotch Book Tape, 845-400, 4 in x 540 in (101,6 mm x 13,7 m), 7010408191
3M 06536, Scotch Steel Gray Masking Paper, 06536, 36 in x 1000 ft, 1 per case, 7000045443 