Set of 2 huge 6 inch diameter lenses, plus an adjustable aperture mirrored reflector lens. Not sure where these came from or what they were used for, maybe a big reflector telescope? One of the lenses has a very small chip in the glass along the outside, but other than that, all three lenses are in excellent condition, with no scuffing or scratches, and they appear to be perfectly ground. They certainly magnify anything very well! Please see pictures for best idea of condition and for exactly what is included. A cool set if you’re looking to build your own telescope or know what these might be used for!