Filter inside low flow modules 800518 & 800519 Back Catalog number: 201119 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0013-01-R Battery Pack AA Alkaline Price on request GB25C Band, 25mm Shrink, Clear 1400/Pack Price on request 6075-0421-20 Screws, Low Flow Module (Pkg Of 20) Price on request