Cassette, 37mm, 3 pc, 0.8µm Polycarbonate, 50/Box Back Catalog number: GC738PC Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 911-9901-NO-R Single Unit Charger w/ Power Adapter, USB GilAir-3 Price on request 800772 Impinger, S-P, Micro, PVC Coated glass (2 oz./50m Price on request 385-0117-01 Tri-pod mounting bracket for Nephelometer (Tri-pod Price on request