If you have bought a K'NEX Web Weaver roller coaster building set
, you may find this extension pack of interest.
It includes 29 lengths of Glow-in-the dark Micro coaster track, the same track lengths that were included when you bought your set.
The pack will allow you to double the length
of your coaster track, provided that you have the extra K'NEX rods and connectors necessary to build a bigger structure to support the extra track.