18' Round 54" Athena Pattern Beaded 20 Mil Liner, 4000 Series - Heavy Duty Beaded Liner

Athena 18' Round 54" Tall 20 Mil Thickness Beaded Above Ground Pool Liner, 4000 Series - Heavy Duty (HD), 5-1800 ATHENA 2 - What distinguishes Doughboy is the thickness of their liner. Doughboy pool liners are the thickest liners available on the above ground pool market. Unlike the majority of liner manufactures that use gauge to measure their liners, Doughboy uses mil. Mil is a unit of measure used to specify the thickness of a material. While Mil is a standard unit, equal to one thousandth of an inch, gauge is a relative number that€™s value is at the discretion of the liner manufacturers when used for stating their liners' thickness.