This is a variable ND filter made by Kenko. The filter diameter is 67mm. I bought this new a year ago and used it a few times, but I'm selling it now because I rarely use it anymore. It comes with the box and storage case. It's in good condition, but it's a used item, so please refrain from purchasing if you are sensitive to such things. The Variable ND Initial is a variable ND filter that allows you to adjust the amount of light reduction by rotating the front frame. It covers a density equivalent to ND3 to ND450*. It's an essential filter for preventing overexposure in single-lens video shooting, and can also be used for slow shutter speed photography in still images. Compared to the professional-spec variable ND "Variable NDXⅡ", the "Variable ND Initial" is a more affordable variable ND filter. Most commercially available low-cost variable ND filters have specifications that cause unintended polarization effects, but the "Variable ND Initial" is designed to prevent polarization effects, just like the "Variable NDXⅡ", so you can use it with confidence. It is recommended for the first variable ND filter you use.