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 Solenoid Valve DIN Connector Learn More Add to cart Air Cylinder Trunnion Bolt Kit Learn More Add to cart Gasket, DIN connector Learn More Add to cart Spray Marker Check Valve, 3 PSI Learn More Add to cart