Features of Standard construction: Cellulose/Cellulose+fiber glass synthetic material Performance Description: Wider pleat width High filtration efficiency Filter Material:*0%Cellulose**0%Polyester Top open bottom close with deflating bolt hole Galvanized stainless metal configuration Rubber seal We choose the moisture-proof material for the wet climate environment ,also the material is suit for the large air flow design . We choose the secondary filtration model for heavy dust in the windy sand climate environment .Shower-proof felt and pre-filtration cloth needed in pre-filtration. Application field Oxygen plant,stove bower,air compressor station,power plant,suit for the supported host machine.