Cassette, 37mm, 3pc, 0.8µm MCE 50/Box Back Catalog number: GCU37080 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0015-01 Lithium Ion Replacement Battery Pack for Nephelometer Price on request 811-9927-05 Cyclone, GK 2.69 37mm O-Ring Kit Price on request TE-22 Teflon Bag, On-Off Valve (0.5L) Price on request