The Sensei PRO 67-77mm Brass Step-Up Ring permits the use of 77mm threaded filters on lenses with 67mm filter threads. It features brass construction and is coated with a matte black finish to minimize reflections. Brass offers enhanced durability and resistance to warping over conventional aluminum rings, and is also less prone to jamming or binding to additional step-up rings, filters, or lenses. This step-up ring has large side knurlings to provide a more textured grip when mounting or removing it from a lens.