they are mainly used in precision chemical ,dye chemical ,sugar ,pharmaceutical ,aluminum industry specification ... 2. Long service life 3.Matrial:Polyester 100% staple filter fabric 5.Thickness:2mm 6.Weight: 245gsm 7.Air Permeability:480L/m2 ... ,non-ferry melting ,chemical industrial ,for tell equipments of frame filter presses ,centrifuge filters ,vacuum filters,vacuum filters ,etc .the filters ...