SNAP-RING filter bags are used in filtration systems worldwide and have been for more than 30 years. They are designed to be an affordable and reliable filter option, made under ISO 9001 standards. N-10-P04S-50 is a 10 micron rated, size 04 filter bag. Made of nylon felt with a carbon steel ring, this bag is sewn using heavy-duty threading for strong seams. When the bag is installed, the top ring serves as a sealing point to prevent bypass between the filter housing and bag. Eaton Part Number: F31D37636 comes in box quantities of 50.