Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 910-1501-EU Gilian 10i,Starter Kit, EU Cord Price on request 910-0913-EU-R GilAir-Plus STP 5-Pump Starter Kit, Bluetooth, Eur Price on request 801863M Manual, BDX II Price on request