Check the listing for details. STEC SEC-4500MO-UC Mass Flow Controller MFC SEC-4500 10 SLM O2 Working Surplus. Condition: Used. Listed at 252.21 USD. STEC SEC-4500MO-UC Mass Flow Controller MFC SEC-4500 10 SLM O2 Working Surplus Inventory # A-18875 Part No: SEC-4500MO-UC Model No: SEC-4500 Range/Gas: 10 SLM, O2 Connector: 9-Pin D Fitting: VCR4 (1/4") May Require Calibration Made in Japan This STEC SEC-4500MO-UC Mass Flow Controller is used working surplus. The physical condition is good, but there are signs of previous use and handling. Sale Details Item Condition: Used Working, 90 Day Warranty Estimated Packed Shipping Dimensions: L x W x H = 12"x12"x12" @ 8 lbs. 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. Items are sold with a 90-Day Satisfaction Guarantee Lister 31