Product#: TG-1650 Availability: This item normally ships within 1 - 2 business days. Description: Threaded joint is at top of main tube and standard taper inner joint or spherical ball joint is at bottom of main tube with outer joint or socket at top of vertical sidearm. Both joints are of the same size, unless otherwise requested. Threaded joint makes o-ring seal when nylon bushing is screwed into adapter and accommodates up to 7 mm thermometers, gas inlet tubes, etc. Suitable for vacuum. Threaded joints are supplied complete with nylon bushing and o-ring. (See TG-1240 for extra o-rings or bushings).