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 Green Spray Marker Dye Concentrate Learn More Add to cart PT 1/4 Air Muffler, metric Learn More Add to cart Air Solenoid Valve, 10mm Fittings Learn More Add to cart Rotary Encoder Switch Learn More Add to cart