Set of two. ① Step-up ring to convert from 46mm to 52mm for digital cameras. ② Step-up ring to convert from 46mm to 58mm for digital cameras. - Brand: Kenko - Type: Step-up ring - Sizes: 46mm to 52mm 46-58 Some items are not in their original packaging, but I believe they have not been used. There is one ring whose purpose is unknown. Thank you for looking.