Cyclone, GK 2.69 25mm O-Ring Kit Back Catalog number: 811-9927-06 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 360-0138-01 Operation Manual/Software CD for Nephelometer, TSP model only Price on request 800884-171-2301 GilAir-5 RP Pump, Starter Kit, 230V Euro Style Plug Price on request 800885-171 GilAir-5 RC Pump, No Charger Price on request