Cyclone, GK 2.69 37mm O-Ring Kit Back Catalog number: 811-9927-05 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9950-01 Cyclone Calibration Jar (For FSP-10 Cyclone) Price on request 783-0008-04 Battery Pack, Replacement BDX II, NiMH Price on request 810-0103-02 GilAir-5 Programmable (ATEX), Pump only Price on request