Features: Filter media : Polyester + PTFE membrane Source of media: USA or China local suppliers Wide pleat spacing and smooth, hydrophobic PTFE provides excellent dust cake release Excellent resistance to chemical erosion Construction: Top cap: open steel plate, no rust End cap: open or closed steel plate, no rust Filter surface: various available Inner core: galvanized mesh Outer strip band: two pieces as reinforcement Gasket: specialty rubber to ensure airtight sealing Chemical Resistance: Oil and water resistance: Excellent Hydrolysis resistance: Very good Acid resistance: Good Alkaline Resistance: Good Application: Filtration of very, very fine dust types in Chemical, Pigment, Al-pulver Welding Fume, Pharmaceutical and other sticky agglomerative dust collections.