Bag PE-1-P02E-WW-30 is a 1 micron size 02 Eaton SENTINEL filter bag made of polyester felt. The bag is constructed by welding the felts together. This creates strong and bypass-free seams, unlike standard sewing. Attached to the top of the bag is a polypropylene ring that snaps into the filter housing and uses a sealing lip to create a barrier to bypass all the way around the bag. Eaton SENTINEL bags are designed to handle demanding commercial and industrial conditions. These bags have impressive strength, but are still flexible and able to adapt to variances in temperature and pressure.