Neewer 7pcs 49mm-77mm Filter Step Up Rings Stepping Adapter Set (49-52-55-58-62-67-72-77mm) Special aviation aluminum alloy, high strength, impact resistance, twist and pressure. Machining process. Font Handling: Font clear mission, silk screening of non-mimeo, attached to a solid! The step-up adapter rings set allows a filter/attachment with larger thread size to be used on a lens with smaller thread size. 100% brand new,never used.