Multi-Flow Module, Blue, GilAir-3/GilAir-5 (1 to 7 Back Catalog number: 800519 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GF25500 Filter, MCE, 5.0µm, 25mm, 100/Pack Price on request 811-1004-01 PM-2.5 Impactor Kit, Replacement for Models 810-10 Price on request 360-0166-01 Manual, Gilian 800i Price on request