Filter, PTFE with Polypropylene Backing, 0.5µm, 37 Back Catalog number: GF37050T Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-1004-04 PM-4.0 Impactor Kit, Replacement for Models 810-10 Price on request 811-9917-05 Go-Cal Dampening Module Price on request 298-0030-01-R Replacement Power Supply for 5 unit chargers 811-0 Price on request