All product sizes and weights are in the information files
This item is a 2.5m long Air Track SUB BASE complete with assembly kit. The SUB BASE is an optional device that mounts below the Air Tube and is joined with sets of adjustable screws to pull the Air Tube as straight as possible for best performance.
The feet are removed from the tube and fitted instead to the Sub Base. Sub Bases are often used to improve the straightness of the 2.5m or longer Air Tracks.
The 2m long Air track is normally used without a Sub Base ..... however it is the decision of the user whether to aim for very straight or to settle for good.