Features: Made of high-quality aviation aluminum alloy. Extremely solid and lightweight. 9 pcs. Lens ring adapter screws easily onto the front of any lens and converts the thread size of your lens to the thread size of any other accessory (such as filters, hoods, flashes, and lens converters). Specially designed for your camera for a tight and secure fit. Step-up set---37-49mm, 49-52mm, 52-55mm, 55-58mm, 58-62mm, 62-67mm, 67-72mm, 72-77mm, 77-82mm. Step-down set---82-77mm, 77-72mm, 72-67mm, 67-62mm, 62-58mm, 58-55mm, 55-52mm, 52-49mm, 49-37mm. Designed for both professional photographers and hobbyists, this set is perfect for anyone looking to elevate their photography game and achieve stunning results. Specifications: Material: Aviation aluminum alloy Color: Black Quantity: 9 pcs Type: Step-up rings / Step-down rings Step-up set---37-49mm, 49-52mm, 52-55mm, 55-58mm, 58-62mm, 62-67mm, 67-72mm, 72-77mm, 77-82mm. Step-down set---82-77mm, 77-72mm, 72-67mm, 67-62mm, 62-58mm, 58-55mm, 55-52mm, 52-49mm, 49-37mm Note: Due to different monitor and light effects, the actual color of the item might be slightly different from the color shown on the pictures. Thank you! Allow 1-2 cm measurement deviation - due to manual measurement. The package includes: 9pcs lens adapter rings