PE-25-P01E-WW-50 Eaton SENTINEL Filter Bag F31R36455This is a SENTINEL filter bag by Eaton filtration. Designed for demanding industrial applications, the SENTINEL bag features polyester felt construction with a polypropylene ring. This ring snaps into place and has a sealing lip that increases in integrity as differential pressure increases, making for a very versatile and adaptable filter bag. Bag description PE 25 P01E WW 50 also denotes this is a size 01 bag that comes in boxes of 50.