Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 201050-100 Filter, Replacement (Packg of 100), GilAir-3/GilAi Price on request GF25120 Filter, MCE 1.2µm 25mm, 100/Pack Price on request 801980 Fixed Mount Assembly, for Gilian 5000Low Flow Ada Price on request