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 aviation aluminum alloy. Extremely solid and lightweight Specifically designed for your camera for tight and secure fit Designed for professional photographers and hobbyists alike, this set is for anyone looking to elevate- their photography game and achieve results- 9pcs The lens 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 hoods, flashes and lens converters