Get the best in no-bypass filter construction with the SENTINEL by Eaton. This filter bag (PEMU-300-P02Z-50) is made of polyester multifilament with a Santoprene ring attached to the top. This ring snaps into Eaton filter housings and creates a bypass-free barrier. The bag is 300 micron, size 02 and will fit in any standard size 02 housing. SENTINEL filter bags feature a sealing lip that is pressure activated. As pressure increases, so does the integrity of the seal! This bag also features an all-welded, silicone-free construction.