SA-T40 This machine suitable for winding tying AC power cable, DC power core, USB data wire, video line, HDMI high-definition line and other transmission lines , This machine have 3 model , please according tying diameter to choose which model is best for you,For example , SA-T30 suitable for tying 20-65MM,Coil diameter is Adjustable from 50-230mm . One machine can coil 8 and round both shape ,coil speed , coil circles and wire twisting number can directly setting on machine , It’s Greatly Improved wire process speed and save labor cost.