Pleated Filter, Standard Capacity, Nominal Height 24 In, Nominal Width 24 In, Nominal Depth 2 In, Actual Height 23 1/2 In, Actual Width 23 1/2 In, Actual Depth 1 3/4 In, MERV 8, Avg Atmospheric Efficiency 30 To 35 %, Nominal Pleat 5 %, Medium Velocity 500 FPM, Med Initial Resistance 0.35 In, High Velocity 625 FPM, High Initial Resistance 0.45 In, Recommended Final Resistance 0.7 In WC, Max Velocity 1000 FPM, Media Area 11 Sq-Ft, Max Temp 60 F, 0.59 Pleats per Linear Feet