Cone pipe stoppers have in comparison with classical pipe stoppers different construction but their use is the same. They are mainly used during repair and maintenance work, accidents and the leak test of pipe- lines. This construction allows their use for all profiles, also egg-shapped, rectangular and many others. These pipe stoppers are made of quality rubber. Therefore they have good chemical resistance, high age-resistance, low weight, and they are simply reparable. The diameter of standard product line ranges from 150 to 2200 mm.