Housing, 37mm 2pc Opaque, 50/Box Back Catalog number: GH37-2 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 385-0114-01 Zero Cap, Black Rubber for Nephelometer Price on request 811-0940-01-R Inlet Filter Replacement Housing for GilAir Plus Price on request