Guardian "Medallion" locker doors have a sound-deadening pan welded to the inside of the door.
Guardian Plus locker doors are made from 14 gauge steel, for use in areas where heavier than usual abuse is expected.
The Defiant II Single Point Latch option for Guardian 1, 2 & 3 tier lockers is for those desiring a heavy gauge door offering improved security with low maintanance inherent in a door with no moving parts.