Filter, Support Pads, Porous Plastic, 37mm, 20.0µm Back Catalog number: GPP3700 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9961-NO Gilian 800i/5000/10i Power Module, No Cord Price on request 800508-171-2301 GilAir-3 RC Pump, Starter Kit, 230V Euro Style Plu Price on request 201119 Filter inside low flow modules 800518 & 800519 Price on request