Often referred to as sock filters, Great Lakes Filters has been manufacturing and supplying industry with our PEM400STP1S Flo-Rite bags for over 65 years. Our standard PEM400STP1S Multifilament Polyester Mesh filter bags are still a mainstay in many industries. Our PEM400ST P1S filter bags come in a variety of micron ratings and efficiencies. There universal applications include everything from industrial coatings and cutting fluids to pharmaceuticals and healthcare products. We offer all ring configurations and material styles to fit your housing. And a wide range of specialty materials to customise to you unique application parameters.