This is a high quality glass 5.65" x 5.65" square ND1.2 Soft Edge Graduated filter made by Formatt Hitech for high-end cinematography. Reduces light intensity by 4 stops on one half of the filter, with the other half clear optical glass. I have several of these filters available. They are ex-rental house owned and in excellent used condition. There are one or two microscopic scratches or cleaning marks on one or two of the filters, but there is nothing that will cause any degradation of the image. Any questions please ask.