This guide explains the differences to give you a better understanding of what thickness liner you are buying. Manufacturers commonly describe the thickness of their liners in MILs or Gauges. Some use the terms interchangeably as they are the same. They aren't. MIL designated liners are 6-12% thicker than a Gauge designated liner for the same number. For example, a 25 MIL liner is about 12% thicker than a 25 Gauge liner.
1. 20 units - A 20 Gauge liner is 0.0185 inches thick. A 20 MIL liner is 0.0205 inches thick or approximately 11% thicker than a 20 Gauge liner.
2. 25 units - A 25 Gauge liner is 0.0223 inches thick. A 25 MIL liner is 0.0250 inches thick or approximately 12% thicker than a 20 Gauge liner. By comparison a dime is 0.0490 inches thick or just under twice the thickness of a 25 MIL liner.
3. 30 units - A 30 Gauge liner is 0.0260 inches thick. A 30 MIL liner is 0.0275 inches thick or approximately 6% thicker than a 30 Gauge liner.
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