The Sunline Tenkara Tapered Line - Extra Cast is an 8m knotless single filament fluorocarbon line that tapers from size 3.5 down to size 1.5. Starting from the end that attaches to the rod, there is 4m of level size 3.5 line, then a 3m length that tapers from 3.5 down to 1.5, then a 1m length of level size 1.5 line. With a shorter, lighter butt section than the Long Cast version, the Extra Cast line will be a bit harder to cast but will be easier to hold off the water's surface. It would be better for expert casters.
The line is clear, suggesting that you will not watch the line for twitches, but instead will fish the fly near the surface so you can see the take, and will fish a line that is tight enough to feel many takes also.
If you wish to shorten the line to use it in narrower streams, cut from the butt end of the line.