Commercial duty aluminium window. Measurements across outside of frame 2020mm wide x 2020mm high. The broken glass on this window is the opening section. I have two windows this hand, and two windows the opposite hand, all in white with tinted glass. The other three are all unbroken. If you win the auction you can have the choice. All are for sale, but too heavy to move around any more than needed. I purchased these windows for a project I was going to undertake, but my situation has now changed so I no longer have a use for them.