The VELUX Rigid Sun Tunnels come in two sizes, 10” and 14”. They are easy to install and comes with its own integrated flashing that can be specified for slates or tiles. It is recommended for a tunnel length of 0.9m to 6.0m. Supplied with this kit is 1.7m of tunnel and additional length can be made up by using the ZTR extension sections. The Rigid Sun Tunnel is ideal for use where there are no obstacles in the roof space such as joists, water tanks and other obstructions in the path of the pipe.