Fotasy 43-46mm Stepping Up Filter Ring Adapter This 43mm-46mm step up adapter ring allows a filter attachment with larger thread size (55mm) to be used with a lens with smaller thread size (52mm). To the side of Lens (Male Thread): 43mm To the side of Filter (Female Thread): 46mm Material: Metal, Color: black Work for 46mm Filters, Lens, Lens hood, Lens cap, etc.