•  MERV 13
 •  High Efficiency With Low Initial Resistance
 •  Moisture Resistant
 •  100% Synthetic Recyclable 
 •  High Loft Media
 •  2 Piece Heavy-Duty Die Cut Frame
 •  Expanded Metal Backing
 •  Double Wall Frame
 •  Diagonal Grid Supports For Maximum Strength
 •  Can Be Used As Prefilters To Extend The Life Of Higher Efficiency Filters Or Use On Their Own
 •  Suitable For Commercial And Industrial Application
 •  UL Standard 900 Classified
 •  "Box Of 12"