Glass panel with metal frame, suitable for windows. These are 2 extra windows that I do not require. If you are replacing your windows then you will reduce your cost by approximately 250 dollars for these 2 windows combined. Asking price is 40 dollars. • Insulated Glass Unit (IGU). • Dimensions: 42" x 18" (Width x Height). • Glass Type: DS Clear + DS Low-E. This stands for Double Strength glass with a Low-E (Low-Emissivity) coating.