Features: Made of high quality aviation aluminum alloy. Extremely solid and lightweight. 18pcs The lens ring adapter easily screws 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). Specifically designed for your camera for tight and secure fit. Step-up Filter Set---37-49mm,49-52mm,52-55mm,55-58mm,58-62mm,62-67mm,67-72mm,72-77mm,77-82mm.Step-down Filter Set---82-77mm,77-72mm,72-67mm,67-62mm,62-58mm,58-55mm,55-52mm,52-49mm,49-37mm. Designed for professional photographers and hobbyists alike, this set is perfect for anyone looking to elevate- their photography game and achieve stunning results- Specifications: Material:Aviation Aluminum Alloy Color：Black Quantity：18PCS Step-up Filter Set---37-49mm,49-52mm,52-55mm,55-58mm,58-62mm,62-67mm,67-72mm,72-77mm,77-82mm. Step-down Filter Set---82-77mm,77-72mm,72-67mm,67-62mm,62-58mm,58-55mm,55-52mm,52-49mm,49-37mm Package Includes: 18Pcs Lens Adapter Rings note: Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation- due to manual measurement.