pocket filter : 1) High dust-contain capacity 2) Filter efficiency:F5,F6,F7,F8 3) Material: synthetic fiber 4) Washable Pocket filter,Medium filter:Material: non-woven fabric (Synthetic fiber)Frame: Aluminum Alloy or galvanized sheetApplication: It is widely used as a secondary filter for clean room or clean factory workshop to cut down the load on high-efficiency filter and prlong the service ...