POF-1-P02E-WW-50 Eaton SENTINEL Filter Bag F31S36935Made of FDA approved meltblown Polypropylene felt, this bag, POF 1 P02E WW 50, is a size 02 filter with a micron rating of 1. Designed to filter out very small material, this bag is constructed using welded seams. As opposed to sewn seams, welded bags have no needle holes for filter material to escape through. Welding and heat sealing also eliminate loose fibers that can affect filtration. SENTINEL bags also have elevated handles for easy filter