The Pentek PO10G1S bag filters are rated to nominal 10 microns The Pentek PO10G1S bag filter has a galvanized carbon steel ring sewn in at the top of the filter bag; The filter bag also comes with a handle for fast, easy bag filter changes. The PO10G1S filter bag is made of FDA-compliant materials. These high flow filter bags are single layer for straining and filtering at high flow rates.