A true 40 is measured .40 at the mouth, while a .45 is .452
Buy the 45 gallon bags. There is less tendency for the sides to fall in and let the ice touch the sides when cooling a keg.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)