Double tube vacuum manifold with 35/20 ball at one end and two 24/40 outer standard taper joints at the other end. Available in either 3 or 4 port configuration with 4mm double oblique stopcocks. Can be ordered with 14/20, 24/40 inner joints or #15 o-ring joints on each port. Distance between ports is 210MM which will allow for flasks up to 3 Liters. Please see our various o-ring joint adapters such as Ace codes 5127, 5128 and 5129.