Solatube 10"  x 16" Extension Tubes

Many other sizes are also available HERE as well as adjustable 90 degree elbows HERE.

These are used to extend the solatube further thru an attic. The standard kit has an adjustable elbow in the top and bottom. You can add up to 20' of tubing including 90 degree elbows, if needed, without any significant loss of light transmission.

Here is a link to the manufacturer's listing of parts with frequently asked questions and more information about these systems and options. Click on these highlighted underlined links to go to that site.