D|Focus Systems 005C Complete D Matte Box (Black) Made of durable ABS plastic and aluminum Two 4 x 4 filter slots, one rotating Very lightweight, 18 oz. for the Complete D|Matte Adjustable French flag, aluminum side flags, and a swing away rail mount (15mm rails) The D|Matte ships with an 82mm adapter ring. A step ring is needed to mount the D|Matte to a lens with a different filter thread [for the clip on version.] Step rings are not included.