Feature●Tilta Lens Attachment for MB-T12 (1) Clamp Tightening Screw - (2) Tilta Tightening Toggles - 1-Year Warranty●The Lens Attachment for the MB-T12 Matte Box allows you to clamp the Matte Box onto lenses with a 125mm front diameter.Description Tilta 125mm Lens Attachment for MB-T12 Clamp-On Matte Box