Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800884-171 GilAir-5 RP Pump, No Charger Price on request C-EZVOCPO Easy-VOC pump (with CapLok tool and carry case) Price on request SC-4 Tedlar Bag (3L) Price on request