S Wolf 16 PCS Meatl Double 82 77 72 67 62 58 55 52 49mm Step Down Rings Lens Adapter Filter Set for Digital SLR Camera his step down adapter ring set allows a filter/attachment with larger thread size to be used with a lens with smaller thread size.Made of metal (not plastic)Color : blackPackage Included: 52mm-49mm Step-down ring x 1 55mm-52mm Step-down ring x 1 58mm-55mm Step-down ring x 1 62mm-58mm Step-down ring x 1 67mm-62mm Step-down ring x 1 72mm-67mm Step-down ring x 1 77mm-72mm Step-down ring x 1 82mm Step-down ring x 1 This step down adapter ring set allows a filter/attachment with larger thread size to be used with a lens with smaller thread size