PE-5-P01E-WW-50 Eaton SENTINEL Filter Bag F31R36704This is an Eaton SENTINEL filter bag made of polyester felt with a polypropylene ring. Using Eaton's bag nomenclature, the description is PE 5 P01E WW 50. This description also denotes a size 01 bag that comes in boxes of 50 bags each. SENTINEL filters features a special sealing ring that adjusts to increased differential pressure. The more pressure, the stronger the seal gets! Other bag features include welded seams, heat sealed edges, and handles