It organizes cable runs and aids in identification, putting an end to tangled wires and the potential heating that could occur when cables are held together tightly under a single fastener. The 3M™ Cable Stacker SI-1 is made from reclaimed plastic. Installation is easy with cables snapping in for a positive lock, simplifying compliance with the spacing requirements of the National Electrical Code, article 300-4-(d) and the Canadian Electric Code Part I, Section 12-516.