Fotodiox Metal Step Up Ring, Anodized Black Metal 43mm-52mm, 43-52 mm Description Fotodiox step-up rings are made of premium grade aluminum with precision. Every ring is inspected to ensure smooth mounting. Every ring is polished and finished with anodized matte surface for professional appearance. This step up adapter ring allows a filter/attachment with thread size of 52mm to be used with a lens with thread size of 43mm. Features: All Metal Design Precise Thread 0.75 pitch size Anodized Black Finishing 24 Month Manufacture warranty Product Details: Product Dimensions: 1 x 1 x 1 inches Item Weight: 0.48 ounces Item model number: 04sr4352 Date First Available: September 13, 2008 Manufacturer: Fotodiox Inc. Country of Origin: China