Conflat Flange (CF) CF 2-3/4 Inch Stainless Steel Fitting, AssortedCondition:* Used/Surplus Stock, Removed From Service. Unable To Test.Additional Notes:* Assorted Length 3 Piece Conflat Fittings, CF 2-3/4 Inches* Vacuum Fittings Are Made of Corrosive-Resistant Stainless Steel* ConFlat (CF) Flanges Are Used For Ultra-High Vacuum Applications* Some Gaskets Included* Lengths One Each: ~8-1/2″, ~7″, ~1-1/2″UNKRP18676