The found present refers to a structure of packing of estate, particularly for glass joints with pipages of graft to variable diameter. The packing structure comprises an external portion to ring-like development that introduces a surface of external estate to substantially cylindrical conformation that is impegnabile with the internal surface of a first tubular body and an inner portion to ring-like development that introduces at least a first feature to connected troncoconica conformation with its greater base to the external portion. The inner portion centrally introduces an axial passage for according to tubular body connecting to held with the first tubular body. Such passage introduces a substantially inferior diameter regarding the diameter of according to tubular body and the inner portion is deformable elastically in order to join to held on the external surface of according to tubular body. The detail structure of the packing concurs to connect to estate, to a first tubular body, second tubular bodies with various diameters between they.