Product Name: Stainless Steel Cartridge Cover up and Down Cartridge Installation: Vertical Lifting Filter Bag Environment: Room Temperature Filter Bag Sectional Shape: Round Bag Filtration Grade: ULPA Filter Usage: Dust Filter Type: Vacuum Cleaner Paper Bag Filter Bag Filter: Outside the Filter Type Cartridge Filter: Non-Woven Polyester Fiber Medium Material: Cotton Material: Polyester Trademark: dy Transport Package: Double Carton Packing Specification: 330*330*690 Origin: Shanghai HS Code: 694211223 Product Description Air filter cartridge Performance Description:A. Wider pleat widthB. High filtration efficiencyC. Filter Material: 80%Cellulose+20% PolyesterD. Excellent ability for moisture protectionE. Top open, bottom open/ bottom close with deflating bolt holeF. Galvanized Stainless metal configurationG. Rubber sealH. We choose the moisture-proof material for the wet climate environment, also the material is suit for the large air flow designI. More filter material you can chooseThe raw materials1.100% cellulose (H&V material)2.80% cellulose+20%polyester (H&V material)3.80% cellulose+20%polyester Flame retardant (H&V material)4.Nano-web5. Nano-web Flame retardant6.Polyester(white,black for choose)7.Polyester+Flame retardant8.Polyester+oil,water resistant9.Polyester+Antistatic10.Polyester+PTFE membrane+Antistatic