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 800511 Carrying Case ,Hard-Side (17.5" x 13" x 7"), BDX-II, GilAir-3 and GilAir-5 Price on request 385-0112-01 Sheath Air Purge Flow Filter for Nephelometer Price on request 800250 Triple Variable Manifold Kit (Includes 6x70mm, 7-10x110mm, 7-10x150mm, 7-10x175mm) Price on request