•  20 X 30 X 1"
 •  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"