Tyaln FC-2900M Mass Flow Controller MFC 500 SCCM He 2900 Series Refurbished. Model No: 2900 Series. Range/Gas: 500 SCCM, He. Includes Calibration Data Sheet. This Tyaln FC-2900M Mass Flow Controller MFC is refurbished surplus. Only items pictured are included: If a part is not pictured, or mentioned above, then it is not included in the sale. Pictured test equipment is not included or available for sale. For items with multiple quantities: The pictured item is not necessarily the one that will be sent. Serial numbers or country of manufacture may vary.