Our precision-rolled .0025" steel shim material provides for a much stronger magnetic attraction than stainless or other shim materials available.  It may be cut to fit with standard scissors and is perfect for shimming cards, coins, bills, envelopes, nearly anything you can imagine.  Sold in 3" x 6" pieces, this will allow you to shim quite a few items and is an excellent value for DIY magic crafters.

Shim Material