Filter, 25mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4525 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-0945-01-R GilAir Plus, DL to STP Upgrade (factory only) Price on request 401931-750-R SCR-PHIL PAN 4-20 X 3/4" Price on request 375-0009-01 Carrying Case for Nephelometer Price on request