Cassette, 37mm .45µm PVC Endotoxin Free, 10/Box Back Catalog number: GCU3745EF Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 385-0115-01 Nephelometer O-Ring, Replacement Price on request 811-9917-04 Go-Cal Carrying Case, Soft Price on request 801146 Impinger Holder Mounting Bracket, GilAir (required Price on request