Single Variable Flow Kit, 7-10 x 175mm Back Catalog number: 800257 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9927-08 Cyclone, 37mm Filter Screen Price on request 800844 Diagnostic Panel with Carrying Case (2-50cc, 20-200cc, 0.5-5LPM), Gilibrator-2 Price on request 360-0201-01 Operation Manual/Software CD for Deluxe Nephelometer, TSP, PM-2.5, PM-4, PM-10 Price on request