Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 911-9901-EU-R Single Unit Charger w/ Power Adapter, USB GilAir-3/5-Euro Cord (Replaces 401097-1 & 401225-1) Price on request 375-0019-01 GilAir Plus Shoulder Bag/Carrying Pouch, soft sided with straps Price on request 800093-3 Inlet Filter Replacement Kit, LFS-113 (Packg of 3) Price on request