Sheath Air Purge Flow Filter for Nephelometer Back Catalog number: 385-0112-01 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9943-01-R Cable, USB-A to USB-B (6 ft) Price on request 910-0903-NO-R GilAir-Plus STP Single Starter Kit, No cord Price on request 811-0917-01-R Replacement Screws for GilAir Plus, Pk of 25 (4-40 Price on request