Pleated Filter, Standard Capacity, Nominal Height 12 In, Nominal Width 12 In, Nominal Depth 2 In, Actual Height 11 3/4 In, Actual Width 11 3/4 In, Actual Depth 3 1/2 In, MERV 9, Avg Atmospheric Efficiency 40 To 45 %, Nominal Pleat 5 %, Medium Velocity 500 FPM, Med Initial Resistance 0.5 In, High Velocity 625 FPM, High Initial Resistance 0.65 In, Recommended Final Resistance 1 In WC, Max Velocity 1000 FPM, Media Area 15 Sq-Ft, Max Temp 60 F, 1.24 Pleats per Linear Feet