Check the listing for details. 30.5mm-40.5mm Step Up Ring Camera Lens Filter Adapter Ring Filter Cloth. Condition: New. Listed at 13.62 USD. The camera lens adapter ring can be installed in front of the lens, allowing you to use filters and accessories different from the size of the camera lens. The adapter ring can change-over lenses of various sizes, so that you can share the same filter, shutter, additional lens, etc.SpecificationColor: BlackMaterial: Aluminum AlloySuitable for: all 30.5mm lenses and 40.5mm filtersOverall Size: 42x6mm/1.65x0.24inch(Dia.H)Male Thread: 30.5mm/1.2inchFemale Thread: 40.5mm/1.59inchPackage List: 2 x Filter Adapter Step Up Rings, 1 x Cleaning ClothAdvantage:The adapter ring is made of aluminum alloy and coated with matte black electroplated coating, which can resist corrosion and other wear elements often encountered in outdoor photography.The package comes with a cleaning cloth, convenient for you to clean your adapter when you replace it.