Abstract: A labeling tag for transmission lines, such as flexible electronic or electric cables or flexible fluid tubing, line comprises a body having a front surface, a back surface and a side edge with an inscribable area either or both of the back and front surfaces. Engagement members extend in opposite directions from the side edge and secure the tag to the transmission line. The engagement members comprising a frame defining a substantially enclosed area sized to receive the transmission line and which is shaped such that the transmission line is wedged between edges of said enclosed area when said tag is applied to a transmission line.