Specification Brand : Lamons BulletPoint1 : Mechanical MERV8 Filter. Air Flow Capacity listed at 300FPM BulletPoint2 : Low initial resistance for energy savings, Quality Engineered, Consistently Produced, Made of 100% synthetic fibers, Made in the USA for over 30 years BulletPoint3 : Single piece beverage board die cut frame, with structural integrity unlike any self supported filter available today BulletPoint4 : Pleats hold together even when wet! No delaminating, no excessive buckling, no collapsing. Filter can endure impact and deformation and return to its original shape BulletPoint5 : ACTUAL SIZE: 17-1/2" Width X 19-1/2" Height X 3/4" Thick, NOMINAL SIZE: 18" Width X 20" Height X 1" Thick CustomerPackageType : Standard Packaging ItemName : Sterling Seal KP-5251023609x2 Purolator Key Pleat Extended Surface Pleated Air Filter, Mechanical MERV 8, 18" W x 20" H x 1" D (Pack of 2) ItemPackageDimensions_Height : 11.43 centimeters ItemPackageDimensions_Length : 50.8 centimeters ItemPackageDimensions_Width : 51.562 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : industrial-process-filter-cartridges Manufacturer : Lamons Material : Heavy Duty Beverage Board Frame, 100% Synthetic Filter Media MinimumEfficiencyReportingValue : 8 ModelNumber : KP-5251023609x2 NumberOfItems : 2 PartNumber : KP-5251023609x2 ProductDescription : Walker 40-1044 direct interchange by Millennium-Filters ProductSiteLaunchDate : 2015-10-05T08:00:01.000Z UnitCount : 2 UnspscCode : 40161505 WebsiteShippingWeight : 0.9752235955 kilograms