replacement pall high filter HFU620,HFU640,HFU660. pleated cartridge. ... : Polypropylene3. Endcaps: Glass filled polypropylene4.O-ring: Ethylene propylene Operating Conditions Maximum Operating Temperature: 82°C replacement part number: HFU620, ... HFU640, HFU660 replacement cartridge grade: UY020,UY045,UY100,UY200, ...