High Speed Back-twisting Machine 1,For CAT5E,CAT6,CAT7 2,Motorized take-up with constant tension 3,Accurrate twist distance 1, ... wire pair twisting with back twist equipment,such as CAT5E,CAT6,CAT7 etc.2,Specifications: Machine modelVertical box typeMax ... 1300*2000Total weightAbout 2200kg Motorized take-up with constant tansion HR-DB-500/630(bobbin size) High Speed Pair Back-twisting Machine