Andoer 18pcs 37-49-52-55-58-62-67-72-77-82mm Step Up/Step Down Lens Filter Metal Adapter Ring Kit 8pcs step up ring:49-52mm/52-55mm/55-58mm/58-62mm/62-67mm/67-72mm/72-77mm/77-82mm. 8pcs step down ring: 82-77mm/77-72mm/72-67mm/67-62mm/62-58mm/58-55mm/55-52mm/52-49mm. Convert the thread size of your lens to the thread size of any other accessories. Made of high quality anodized aluminum alloy. This kit includes 9pcs step up ring and 9pcs step down ring, used to convert the thread size of your lens to the thread size of any other accessories such as filters, hoods lens converters.