The plug part is a unique double layer (patent pending) designed to prevent loosening and insulation. The cap and body of the DC plug are made of resin for a safe design. The cable adopts a shield structure type (CU-416) that is not affected by external noise. (Used with Solderless Cable SL Series) The cable itself has very low resistance so it can reduce the loss of power from the power supply. It also has the flexibility needed for wiring inside the pedal board.