Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800061 Cyclone, Dorr-Oliver, 10mm - Nylon (1.7LPM-US) Price on request 811-0904-EU-R Five Station Dock w/Comms 100-240Vac, 50-60 Hz, Eu Price on request 811-0505-01-R Single Unit Replacement Charger only, USB Gilibrat Price on request