12 Aluminum Foil Household foil is typically 17.5 mm (0.0007 inches) Available in gauges as low as 7 mm (0.00028 inches) Pin holing is present below 12 mm (0.0005 inches) Foil is susceptible to flex cracking Most foils are supported with plastic and/or paper Unsupported foil used for some lid-stock & tablet push-through packaging12 Aluminum Foil Household foil is typically 17.5 mm (0.0007 inches) Available in gauges as low as 7 mm (0.00028 inches) Pin holing is present below 12 mm (0.0005 inches) Foil is susceptible to flex cracking Most foils are supported with plastic and/or paper Unsupported foil used for some lid-stock & tablet push-through packaging