Housing, 37mm 3pc Opaque, 50/Box Back Catalog number: GH37 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 385-0115-01 Nephelometer O-Ring, Replacement Price on request 850190-1-R Gilibrator 2 USB, Control Base Price on request 783-0007-01 Battery Pack, Replacement for Gilian 5000, 800i & Price on request