Really crappy magnesium M frame lenses with nose piece. I think these are the original lenses that came with my mag M frames. They are heaters blk ird. Sorry but they are scratched, tweaked at the contacts on both sides, starting to crack in the middle. Honestly I think they have one more installation into a frame. The only reason I am getting rid of them is I know someone out there has a frame and needs a lens for their collection and I have three lenses for mine. Now the really strange thing. They do not have magnesium printed on them like my other three. I will send them UPS to someone who wants them for 10 dollars plus my cost on shipping in the USA.