Further Detail The Adjustable length of Spectralight InfinityTM tube allows you to install on a pitched roof easily. Using the adjustable Solatube angle can adjust from 0 all the way up to 90o. For those installation where a bit more ‘flexibility’ is required we can offer these unique adjustable angles, so we are sure there will be something to meet your needs. If your installation requires a bit of ‘fiddling around’, we suggest purchasing the 0-90°, instead of a regular extension. It costs a little bit more money but can save your time and hassle on the job, making installation a lot easier. Features & Benefits: Uses exclusive 99.7% reflective tube material. Allows flexibility during installation. Range of angles in which it can be used.