* Moisture resistant 
* Wide variety of pocket lengths and counts 
* Fail safe mechanically 

Staked pocket attachment 
* Sonic welded pocket construction 
* Five efficiencies - 
90 - 95%, 
80 - 85%, 
60 - 65%, 
50 - 55%, 
40 - 45%, 

 
 
* Self-sealing models - (40 - 45%, 60 - 65%) 
* U.L. Class 1 and Class 2.