• Highly reflective rigid tunnel the TGR rigid Velux Sun Tunnel skylight features highly reflective tunnel that provides brighter, whiter light output in any application. The model TGR is great for long tunnel runs Low profile metal flashing -The TGR Sun Tunnel skylight features an innovative one-piece low profile metal flashing that is parallel and blends into roofline Ceiling frame -The TGR Velux Sun Tunnel skylight comes with pre-assembled ceiling ring and paintable ceiling trim ring to complet