Sun Tunnel with Rigid Tunnel and Pitched Flashing. 52-in Non-Insulated Acrylic Rigid Sun Tunnel Tubular Skylight. Brings bright, white natural light to small spaces such as interior bathrooms and hallways. Features the Flexi Loc tunnel connection system that significantly reduces tunnel assembly time for a fast and easy installation. 99.99% silver reflective layer with a 20 year tunnel warranty. Pivoting tunnel system makes roof pitch adjustments easier and allows more light to be captured. 1-Piece pitched metal flashing provides optimum angle for gathering light from all roof directions.