Sun-Tek 22.5-in x 46.5-in Fixed Self-flashing Skylight with Tempered Low-e Argon GlassThe skylight comes with self flashing and a 4 in flat flange, eliminating the need for an extra flashing kit. It also includes a 20 year limited warranty and comes fully assembled with installation hardware. The tempered low e argon glass is double insulated for maximum thermal benefits, with a built in aluminum curb that is only 2 1 8 in high, perfect for Florida building code and Texas department of insurance requirements. Please note that a minimum