Aluminum Sash and glass only. NO FRAME. Good used window but seals are old and need replaced. Glass is good. The hinge on this window is steel and is froze up from rust. You may be able to free up the hinge with WD-40 or PB Blaster but no guarantees. A couple of the hinge knuckles have cracked. (See close up photo) Window may vary from photo but is in comparable condition. These are old windows that may have some oxidation and may have some paint on them but is easy to remove. The approximate rough opening would be around 12" x 30-1/4".