Cassette, 37mm, 2 pc, 0.8µm Polycarbonate, 50/Box Back Catalog number: GC728PC Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-1004-01 PM-2.5 Impactor Kit, Replacement for Models 810-10 Price on request 800844 Diagnostic Panel with Carrying Case (2-50cc, 20-20 Price on request SC-2 Tedlar Bag (1.5L) Price on request