Green.L 49mm lens filter. I bought this a few years ago but never used it, and it's been in storage. As far as I can see, there are no scratches, but this is a casual inspection, so there may be oversights such as initial defects. Thank you for your understanding. According to the search results, the main features are as follows: Polarizing (PL) filter or Neutral Density (ND) filter. Employs "dHD Dight High Definition" technology. Filter diameter is 49mm. Used to suppress reflected light or adjust the amount of light. That's what it says. I'm a novice when it comes to cameras, and I don't know the details, so please check and understand before purchasing. Thank you.