Cassette, 37mm 2pc 5.0µm PVC, 50/Box Back Catalog number: GCU37500PVC-2 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 360-0138-01 Operation Manual/Software CD for Nephelometer, TSP model only Price on request 800518 Low Flow Module, Blue, GilAir-3/GilAir-5 Constant Flow, Single Tube (20 to 500 cc/min.) Price on request TE-27 Teflon Bag, Septum Valve (4.7L) Price on request