The Pentek PE50G1S bag filters are rated to 50 microns (nominal). The Pentek PE50G1S 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 PE50G1S filter bag is made of FDA-compliant materials. These high flow filter bags are single layer for straining and filtering at high flow rates. The Pentek PE50G1S Polyester Felt Filter Bags are Size number 1 which means they are 7-1/16 inches in diameter and 16-1/2-inches in length. The bag filter area is 2 square feet. The Pentek PE50G1S Polyester Felt Filter Bags can withstand temperatures up to 300F. There is an initial pressure drop of less than 0.5 psi for the maximum rated flow at 68 degrees Fahrenheit. Differential pressure of 15 psi indicates the filter bag needs to be changed.