Manufacturer Part Number: FR51048|Filter Roll Type|MediaMedia Material|Polyurethane FoamOverall Thickness (Decimal Inch)|1Filter Efficiency|Arrestance Efficiency|60 to 80%Overall Width (Inch)|48Surface Treatment|Media Color|Features|WashableFor Use With|Lennox Type FurnacesStandards|Maximum Air Flow (FPM)|Initial Resistance at FPM (Inches w.g.)|Final Resistance at FPM (Inches w. g.)|Particle Capture Efficiency (%)|20 to 30Maximum Termperature (F)|Core Type|Rolled Diameter (Inch)|EPP Indicators|Overall Length (Feet)|25Merv Rating|5Air Flow|Product Service Code|UNSPSC Code|