Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GH37SR Housing, 37mm 3pc Solvent Res 50/Box Price on request 360-0040-01 Manual, GilAir-3/GilAir-5 Price on request 811-0902-EU-R Five Station Basic Dock 100-240Vac, 50-60 Hz, Euro Cord. (incl Pwr Supply) Price on request