Corning Pyrex Borosilicate Glass Graham Condensers with Top and Bottom 24/40 Standard Taper Joints, 400mm Jacket Length (Case of 4): Industrial & Scientific. Corning Pyrex Borosilicate Glass Graham Condensers with Top and Bottom 24/40 Standard Taper Joints, 400mm Jacket Length (Case of 4): Industrial & Scientific. Coiled condensing tube is sealed into water jacket 。 Inlet and outlet tubes on opposite sides of jacket 。 With Standard Taper drip tip joint at bottom and Standard Taper outer joint at top 。 The 8” condenser has 19/38 joints; others have Standard Taper 24/40 joints 。 These PYREX Graham condensers have a high surface area per unit length of the 400mm long jacket with a 24/40 Standard Taper outer joint at the top and a 24/40 Standard Taper inner joint at the bottom with a drip tip. They are primarily used in vacuum distillations. Condenser tubulations are approximately 10mm O.D. 。 。 。