Allihn Condenser with Standard Taper Joints with Removable Hose ConnectionsThe inner glass tube of the glass allihn condenser is with a series of spherical bubbles to maximize the thermal contact with the cooling water. with removable hose connections With 14 20 top outer and bottom inner joint,to be used with any apparatus with 14 20 standard taper joints. the length is 120mm. Laboy glass are all made of high quality borosilicate glass and made by hand blowing to ensure uniform wall thickness.