A perfect complement to the ProMaster filter line. ProMaster Stepping Rings are precision machined to properly convert the thread size of your filter and/or lens.

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.