3M™ Scotchlok™ Electrical Idc 558-Pouch, Run and Tap, Flame Retardant, Red, 22-16 Awg, 100/Pouch, 1000/Case. 3M™ Scotchlok™ Insulation Displacement Connector 558 electrically connects a tap wire to a run (through) wire while insulating the connection. The connector is polypropylene insulated and self stripping.