Product Name: H13 High Efficiency Cartridge True HEPA Filter Replacements for Queen Defender 4000 & 7500 Air Purifiers Model NO.: BS040 Type: Air Filter Filtration Grade: HEPA Filter Efficiency: H13 Medium Material: Fiberglass Filter Number: 1 Clapboard: without Clapboard Application: Industry Material: metal Net and Paper and Polyurethane Filter Connector: Round Connector Activated Carbon Filter Type: No Carbon External Diameter: 283mm Internal Diameter: 188mm Height: 204mm Applicable Models: for Filter Queen Defender 4000 Air Purifier Supplier: Nanjing Blue Sky Filter Co., Ltd. Trademark: Blue sky Transport Package: Standard Export Carton Specification: CE Origin: Nanjing, Jiangsu HS Code: 8421991000 Product Description Part Name H13 High Efficiency Cartridge True HEPA Filter Replacements for Queen Defender 4000 & 7500 Air PurifiersPart NO.BS040To FitForFilter Queen Defender Air Cleaners including D360, AM4000, RAC4000, 7500 & DP360.SizesExternal Diameter: 283mmInternal Diameter: 188mmHeight: 204mmColourBlack (Customized)Structuresmetal Net and Paper and PolyurethaneFiltering Efficiency GradeH13High Efficiency(Customized)Special PropertiesBetter Filtration Means Cleaner Air, Less Dusting, and Longer Secondary Filter LifePackaging(Customized)NanjingBlueSkyFilterCo.,Ltd.AsaprofessionalmanufacturerofairfilteringproductswithISO9001andISO14001inChina,NanjingBlueSkyFilterCo.,Ltd.Producesandsuppliesthefollowingitems:1. Dustbags/airfiltersforthevacuumcleaners.2. Airfiltersfortheairpurifiers/airscrubbers/humidifiers/dehumidifiers3. GreaseAirFiltersforKitchenCookerHoods4. Odor/SmellAbsorbAirFiltersforRefrigerators5. Airfiltersformotorsandautomobiles6. Advancedairfiltersformedicalappliances7. Prefilter+HEPAfiltersforHVACandanyotherusages,suchasV-bankHEPAFilters8. AirFiltersandfilterbagsfortheindustrialmachinesandequipmentasthereplacementsOurairfiltersarevariouswithdifferentshapesandmaterialsaccordingtothecustomer'sspecificationsandrequirements.AndtheefficiencygradeisfromlowtoHEPA14grade(MERV19)accordingtoEN779,EN1822andASHRAE.Andourtechnicaldepartmentisreadytodevelopanynewairfilteritemforresidential,commercialandindustrialuse.1. Can the product be customized?Yes, both the product and the packaging can be customized.2. How to pay?Our company accepts various ways of payment, such as T/T , L/C etc.3. How long is the delivery time?It depends on the order quantity. USually it takes about 30 days to produce a full 20' container.4. Do you arrange the shipment?Yes, our company can arrange the shipment to deliver the goods according to the client's customer's requirements.5. What about the after-sales service?Our company is responsible for the supplied product within its usage life.