Velux TMR 010 1000EO Sun Tunnel, 10" Tubular Skylight Impact Polycarbonate Dome Super Energy Efficient w/Pitched Flashing & Rigid Tunnel Super energy efficient - Quad diffuser meets ENERGY STAR requirements Pitch flashing for straighter tunnel runs and even light output throughout the day Low profile impact polycarbonate dome Pivoting tunnel system 14 - 60 degree roof pitch Flexi Loc&trade; tunnel systems for easy and speed of tunnel assembly Brighter white light Excellent for long runs