Check the listing for details. STEC SEC-4500M Mass Flow Controller MFC SEC-4500 10 LM O2 Working Surplus. Condition: Used. Listed at 194.40 USD. STEC SEC-4500M Mass Flow Controller MFC SEC-4500 10 LM O2 Working Surplus Inventory # 19711 Part No: SEC-4500M Model No: SEC-4500 Range/Gas: 10 LM, O2 Connector: 9-Pin D Fitting: VCR4 (1/4") CE Marked May Require Calibration This STEC SEC-4500M Mass Flow Controller MFC SEC-4500 10 LM O2 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 = 10"x10"x10" @ 5 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