This Kontes® Vigreux distillation head promotes better refluxing prior to condensation, yielding a better separation. Design uses Vigreux indentations for increased surface area within the vapor path. The bulb and stem serve as column packing. Closely coupled condenser and vacuum connections provide a short condensate travel path. Short path. Height x Width: 105 x 95mm. Standard Taper Joint: 14/20. Thermometer Joint: 10/18. Hose Connection Number: 1. Kimble Chase #: 287120-0000.