Flame-resistant construction and ignition-resistant tempered diamond wire glass as the standard pane help Velux TZR and TZRL Wildfire Glass Curb-Mount Sun Tunnel Skylights to meet Wildland-Urban Interface (WUI) zone requirements. The Sun Tunnels combine a 14-inch Velux Fixed Curb-Mounted Skylight with an adapter that connects to a standard 14-inch reflective aluminum tunnel. The TZR option, for tile roofs, does not include a flashing kit (a Velux tile flashing kit can be purchased separately); the TZRL option, for shingle roofs, includes a flashing kit and adhesive underlayment. Pricing varies by region. veluxusa.com