Model 106L - Mill Finish Only
Die cast aluminum with aluminum damper for tight closure, the 106-L has a 1.375 inch lintel on top for extra strength. 64 square inches of Net Free Area.
Model 106S - Mill Finish Only
Die cast with aluminum, the 106-S does not have a damper. 64 square inches of Net Free Area.
Model 106 - Mill Finish Only
Die cast aluminum with aluminum damper for tight closure. 64 square inches of Net Free Area.