... insulation performance,which make them safe for using in cable occupied duct. High Density polyethylene(grade: for insulating ... be equipped with different size reel according to the length of rod. There are wheels on the reel, ... choice,and we can also accept OEM order Length 30,50,60,80,100,120,150,180, ... 200,250,300,350,400,450,500 meters for choice. Material Fiberglass (inner) and high density ...