This is a thin-frame 72mm ND filter ◡̈ It's a high-precision neutral density filter that allows for 4 stops of light reduction. It's a front-threaded type, so you can also attach a lens cap. I've used it 2-3 times, but I'm selling my 72mm lens, so I've been storing it in a dehumidified storage box ◡̈ The lens cloth that came with the purchase has been used, so I can't include it, but I'll sell it to someone who wants it ◡̈