Cyclone, 37mm Filter Screen Back Catalog number: 811-9927-08 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 385-0117-01 Tri-pod mounting bracket for Nephelometer (Tri-pod not included) Price on request 380-0035-01 Nephelometer Pump Assy, Replacement Price on request GF25450 Filter, MCE, 0.45µm, 25mm, TEM 100/Pack Price on request