This is a one-side quick disconnect flange set for rapid access into 1" O.D vacuum chamber through flanged port. Quick-Disconnect flanges are a fast and convenient method for coupling and uncoupling metal and glass tubing. SPECIFICATIONS Type (Please select an option bar) QuickDisconnect Flange QuickDisconnect Flange with right-angle valve Item Number FL-25KF25-QD FL-25KF25-QDV Package included One KF25 quick Disconnect flange set One KF25 quick disconnect flange set One KF25 clamp set One KF25 to KF25 right-angle valve Structure Click to enlarge Click to enlarge Features Vacuum level: 10E-6 torr by the molecular pump and 10E-2 torr by the mechanical pump Temperature Range: -20ºC to 150ºC Made of 304ss Fittings Leak Test: 2x10-10 cc/sec He Optional You may order a single end flange with a valve as a gas inlet ( click pic below left to order ) Due to the weight of the QuickDisconnect flange with the Right-Angle valve, we recommend the following support: Adjustable Tube Support (320 - 510mm H) for KF25 Flanges - FLS-KF25 only $39.95 Warning: Must put thermal block inside the tube during heating to avoid o ring on the flange damaged, which not be covered by the warranty ( click pic to order ) Optional Click here to choose flange for tube from 42mm to 11" Vacuum Pump & High Vacuum Station