Home » Weight Watcher » Weight Watcher Parts » Filter for MFD Air Filter/Regulator Filter for MFD Air Filter/Regulator SKU: RFF-4071 Availability: Available Price: $6.70 Filter for MFD Air Filter/Regulator quantity Add to cart Description Replacement filter for MFD-brand air filter/regulator (RFF-4070). Related products Spray Marker Check Valve, 3 PSI Learn More Add to cart Spray Marker Adjustable Nozzle, Brass Learn More Add to cart Load Cell Learn More Add to cart Blue Spray Marker Dye Concentrate Learn More Add to cart