Your picture could indicate that there are...
Your picture could indicate that there are nine different lengths available but the "select option" box
only shows the 3', 9', & 15'.
If you don't carry the other lengths and are simply using NRS's generic picture maybe you could
consider offering the others as I for one would be interested in some of them.
The "select option" box shows which option are in stock. At the time I am writing this they have all lengths in stock and therefore all are represented in the drop down. That changes from day to day. I believe this is true of all backcountry.com listing.
Hope that helps.