Specification Amount : 7.98 Binding : Jewelry Brand : Fotodiox Color : Black CurrencyCode : USD Label : Fotodiox Inc. Manufacturer : Fotodiox Inc. MaterialType : Black Anodized Aluminum MetalType : Aluminum Model : 04sr40543 PackageDimensions_Weight : 0.022046001186074866 PackageDimensions : L:1.799999998164 X W:1.699999998266 X H:0.099999999898 PartNumber : 04sr40543 ProductGroup : Photography ProductTypeName : RING Publisher : Fotodiox Inc. Size : 40.5-43 mm SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/31PL5RXt4EL._SL75_.jpg SmallImage_Width : 75 Studio : Fotodiox Inc. Title : Fotodiox Metal Step Up Ring, Anodized Black Metal 40.5mm-43mm 40.5-43 mm Weight : 0 WeightUnit : pounds