Distribution block for data transmission system:The branching card is not only used for branching copper core communication cables, but also suitable for branching optical cable splice boxes, radio and television optical/cable splicing, and railway signal cables. It can be used with vertical (hat-type) optical cable splice boxes for optical cable branching, providing convenience for the construction of communication systems.Heat Shrink Attachment-Air Pressure Diverter Clip,Heat-shrink tube,Heat shrinkable tubing,thermal contraction pipe,Shrink tube.