Mounting Flange Inside Diameter — This is the most critical dimension and should be very close to the diameter of the application's inlet flange. The flange will stretch up to 1/8” for those in-between sizes Filter Diameter — This is the outside diameter of the filter. The top size is listed first, then the base size. Always use the largest size filter that is practical for the application Filter Length — This dimension is the vertical length of the filter body only, it does not include the length of the flange, nor does it take into account the taper of the filter media. Always use the longest filter practical, for maximum filtration Flange Angle and/or Length — If no angle is listed in the specifications table, the flange is straight. Any angle listed is in degrees and can be utilized when space is a problem Flange Type — The location of the flange in relation to the O.D. of the filter is sometimes offset to one edge of the filter for more clearance in an application
