Specification Amount : 7.98 Binding : Jewelry Brand : Fotodiox Color : Black CurrencyCode : USD Label : Fotodiox Inc. Manufacturer : Fotodiox Inc. MaterialType : Metal MetalType : Aluminum Model : 04sr4955 PackageDimensions_Weight : 0.03 PackageDimensions : L:1.99999999796 X W:1.49999999847 X H:0.49999999949 PartNumber : 04sr4955 ProductGroup : Photography ProductTypeName : RING ProductTypeSubcategory : 42101610 Publisher : Fotodiox Inc. Size : 49-55 mm SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/31zw6tmm4CL._SL75_.jpg SmallImage_Width : 75 Studio : Fotodiox Inc. Title : Fotodiox Metal Step Up Ring, Anodized Black Metal 49mm-55mm 49-55 mm Weight : 0 WeightUnit : pounds