Kenko PL 52mm filter. In my amateur opinion, both the frame and the glass surface appear to be clean. There is no included plastic case, so it will be shipped in a separate Kenko case (as shown in image 4). This is a used item, so please refrain from purchasing if you are concerned about minor details. - Brand: Kenko - Type: PL Filter - Size: 58mm - Country of Manufacture: Japan Thank you for looking.