1. A SPACER FOR BUNDLED CONDUCTORS OF OVERHEAD LINES COMPRISING AT LEAST TWO CLAMPS, EACH FOR ATTACHMENT TO A CONDUCTOR OF THE BUNDLE, AT LEAST ONE ABUTMENT FIXED WITH RESPECT TO EACH CLAMP, AND MEANS FOR RESISTING UNDESIRABLE MOVEMENTS BETWEEN AT LEAST ONE PAIR OF SAID CLAMPS COMPRISING A FLEXIBLE TUBULAR STRUT IN THE FORM OF A CLOSECOILED HELICAL SPRING SPACING THE CLAMPS OF SAID PAIR APART, A RECTILINEAR TIE MEMBER IN THE FORM OF A FLAT STRIP OF METAL LOCATED WITHIN THE STRUT AND TYING THE CLAMPS OF SAID PAIR TOGETHER, AND TWO SUPPORTING STRUCTURES BETWEEN WHICH THE EFFECTIVE PART OF THE TIE MEMBER EXTENDS EACH COMPRISING A RIGID MEMBER ATTACHED TO THE TIE MEMBER AND A FLEXIBLE MEMBER ARRANGED BETWEEN AND SO ATTACHED TO THE RIGID MEMBER AND TO ONE OF SAID ABUTMENTS THAT THE TIE MEMBER IS HELD SUBSTANTIALLY IN A PLANE AT RIGHT ANGLES TO THE CONDUCTOR AXES OF SAID CLAMPS.