The DURAN® cores with outlet comply with DIN 12249 Form G. The process has the function of a drip ring. It prevents the liquid from running down the inner wall of the vessel. For this purpose, the outlet is usually cut at an angle and fused. At the same time, mediums do not come into contact with the greased ground surface. The additional outlet can also be used as an attachment point for extensions for various purposes, e.g. as an inlet pipe.