Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended GH37 Housing, 37mm 3pc Opaque, 50/Box Price on request 811-1604-EU Gilian 12 Power Module, EU Cord Price on request 800885-171 GilAir-5 RC Pump, No Charger Price on request