High Speed Back-twisting Machine 1,For CAT5E,CAT6,CAT7 2,Motorized take-up with constant tension 3,Accurrate twist distance 1,Application:Applicable for the ... data cable, for core wire pair twisting with back twist equipment,such as CAT5E,CAT6,CAT7 etc.2,Specifications: Machine modelVertical box ... -up with constant tansion HR-DB-500/630(bobbin size) High Speed Pair Back-twisting Machine