Air Boss & Restrictor Kit, GilAir-3/GilAir-5 and B Back Catalog number: 800320-1 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 360-0138-01 Operation Manual/Software CD for Nephelometer, TSP Price on request 811-0944-03-R GilAir Plus, STP to STP BlueTooth and Motion Upgra Price on request 811-0940-01-R Inlet Filter Replacement Housing for GilAir Plus Price on request