Filter, 37mm, 0.4µm, Polycarbonate, Plain White, 1 Back Catalog number: GFPC4537 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9918-02 Go-Cal AC Adapter NEMA, 100-240V Price on request 385-0112-01 Sheath Air Purge Flow Filter for Nephelometer Price on request 811-9961-NO Gilian 800i/5000/10i Power Module, No Cord Price on request