SNAP-RING filter bags from Eaton offer a cost effective option with consistent performance. Bag description PO-50-P03O-50 is for a size 03, 50 micron Polypropylene filter. This filter bag features a Polypropylene plastic SNAP-RING attached to the top of the bag. Made using the best available materials, this bag is manufactured under strict ISO 9001 standards. Get a bag that is tailored to your application with 14 different micron rating, felt materials, and ring types. Box quantities required. Comes 50 bags per box.