Nephelometer O-Ring, Replacement Back Catalog number: 385-0115-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800282 LFS Pump Pneumatic Overhaul Kit Price on request 801453 O-Ring/Gasket Kit, GilAir-5 Price on request 800573-100 Diagnostic Panel only, Hi/Lo (2-50cc, 20-200cc, 0.5-5LPM) with 100 inch Magnahelic Price on request