Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800485-171 GilAir-3 R Pump, No Charger Price on request 800844-1-230 Gilibrator-2Low Flow Diagnostic Kit, 230V, EU Cor Price on request GF37500PVC Filter, PVC, 5.0µm, 37mm, 100/Pack Price on request