The NiSi Brass Pro 67-82mm Step Up Ring allows the use of 82mm threaded filters on lenses with 67mm standard filter threads. Featuring a durable brass frame with Knurled sides for easier grip. The Brass Step up ring prevents binding and jamming making it easier to remove compared to standard aluminum setup rings. The NiSi Brass Pro Step Up Ring has a special anti-reflective felt treatment on the inside of the frame to minimize reflections and features a matte black finish. The anti-reflective felt treatment make them the perfect companion for long exposures.