ProMaster Step Down Ring - 46mm-37mm

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ProMaster Step Down Ring - 46mm-37mm ProMaster SKU: 4921 | Helix SKU: PR4921 Overview ProMaster Stepping Rings are the perfect addition to your collection of photographic gear. Use them with special effects filters and add on lenses to convert a lens with one thread diameter to a filter or conversion lens with another. ProMaster Stepping Rings are precision milled and designed to give you years of reliable service. Show more