Crafted from polypropylene felt, Eaton's UNIBAG filter bags provide a fully welded design, which is superior to the sewn varieties. Its polypropylene ring offers a 100 percent bypass-free filtration that is also chemically resistant. The bag is also specially treated to diminish the shedding of fibers. You can feel confident that all UNIBAG filters have passed Eaton's strict Engineering Standard testing to give you the value and dependability you need. These filter bags have a micron rating is 50 and a size of 2. Available in boxes of 30.