Specification Brand : DerBlue BulletPoint1 : Package includes:4pcs True HEPA Filters(size of each:10 x 4.6 x 1.37 inch) and 8pcs pre filters(size of each:10 x 4.1 inch)..Replaces Filter A,Filter D,Filter K.In order to keep the air clear, It is best to replace the filter at least once every 4 months BulletPoint2 : Compatible with Holmes Units:CAP531-U, CAP529-U, HAP240, HAP242, HAP412, HAP422, HAP424, HAP706, HAP716, HAP9240, HAP9242, HAP9412, HAP9414, HAP9422, HAP9424,HAP1200 BulletPoint3 : Compatible with Bionaire Units:HAP412, HAP422, HAP424, HAP702, HAP706, HAP716, HAP1702, HAP2400, HAP9240,HAP9241, HAP9242, HAP9243, HAP9412, HAP9413, HAP9414, HAP9415, HAP9422, HAP9423, HAP9424, and HAP9425 models.Also fits with BAP260, BAP520, BAP815, BAP825, BAP9200, BAP 9417, BAP9427, BAP9435, and BAP9700 models BulletPoint4 : Durable and Long-Lasting: Made from high-quality materials, our filters are built to last. Each filter has a durable construction that ensures prolonged usage and maximum effectiveness BulletPoint5 : Excellent Customer Support: We value your satisfaction and offer exceptional customer support. If you have any questions or concerns regarding our filter, feel free to reach out to our friendly customer service team. We are here to provide you with the assistance you need for a hassle-free experience BulletPoint6 : Color : Green CompatibleDevices : Air Purifier CompatibleDevices1 : Compatible with Holmes Units: Compatible with HAP412, HAP422, HAP424, HAP702, HAP706, HAP716, HAP1702, HAP2400, HAP9240, HAP9241, HAP9242, HAP9243, HAP9412, HAP9413, HAP9414, HAP9415, HAP9422, HAP9423, HAP9424,and HAP9425 models CompatibleDevices2 : Compatible with Bionaire Units:BAP260, BAP520, BAP815, BAP825, BAP9200, BAP 9417, BAP9427, BAP9435, and BAP9700 models CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier1 : 850033652048 ExternallyAssignedProductIdentifier2 : 0850033652048 GpsrSafetyAttestation : 1 IncludedComponents : 2 x HEPA Filter + 8 x Activated Carbon Filter ItemName : DerBlue Replacement True HEPA Filter Compatible with Holmes AER1 Series Including 4pcs Filters and 8pcs Pre Filters Replacement Parts # HAPF300AH-U4R, HAP242-NUC ItemPackageDimensions_Height : 26.289 centimeters ItemPackageDimensions_Length : 13.3096 centimeters ItemPackageDimensions_Width : 18.288 centimeters ItemPackageQuantity : 4 ItemTypeKeyword : air-purifier-replacement-filters Manufacturer : DerBlue Material : Fiberglass Material1 : Plastic Material2 : Paper MinimumEfficiencyReportingValue : 16 ModelName : 116130 True HEPA Replacement Filter H ModelNumber : DB-K-212574 NumberOfItems : 12 NumberOfPieces : 12 PartNumber : DB-K-212574 ProductDescription : Package includes: 4pcs True HEPA Filters and 8pcs pre-filter ProductGrade : new ProductSiteLaunchDate : 2019-08-02T07:00:00.000Z Size : 12 Piece Set Style : 2 True HEPA Filter + 8 Activated Carbon Filter SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 40161505 WarrantyDescription : Manufacturer's warranty for 90 days from purchase date WebsiteShippingWeight : 0.721 kilograms