Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 380-0035-01 Nephelometer Pump Assy, Replacement Price on request 850194-3K Timer Board Replacement Kit, GilAir-3/GilAir-5, Program (Includes Control Board) Price on request GCS25455-50 Cassette, 25mm, Classic Style TEM, 0.45µm, MCE, 50/Box Price on request