Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9917-04 Go-Cal Carrying Case, Soft Price on request 800883-171-2301 GilAir-5 R Pump, Starter Kit, 230V Euro Style Plug Price on request 800148 Manifold Kit, Dual, 6 x 70mm (Standard Charcoal Tu Price on request