Housing, 37mm, 2Pc, 50/Box Back Catalog number: GCO37050-2 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 360-0049-01 Manual, Gilibrator-2 Flow Monitoring Software Price on request 800303 Valve Plate Assembly, Bottom, GilAir-3 Price on request 800573-100 Diagnostic Panel only, Hi/Lo (2-50cc, 20-200cc, 0.5-5LPM) with 100 inch Magnahelic Price on request