Landing Line Tube with Inserts - PROFor the smoothest sheeting and most reliable form of auto unwind, you'll see your Navigator Pro Depower Main Line and landing line run inside individual tubes, instead of a single multibore tube. The tubes are made from the highest quality, durable, wear resistant TPU and they are stacked front to back for comfortable, one handed flying. For the smoothest sheeting and most reliable form of auto unwind, you'll see your Navigator Pro Depower Main Line