colour: Black Material: Aluminum alloy size: 37mm-49mm,49mm-52mm,52-55mm,55-58mm,58-62mm,62-67mm,67-72mm,72-77mm,77mm-82mm,82mm-77mm,77mm-72mm,72mm-67mm,67mm-62mm,62mm-58mm,58mm-55mm,55mm-52mm,52mm-49mm,49mm-37mm Package Contents: 18 x Lens Filter Ring Adapter ; small-diameter outer thread (connection end of the lens), a large-diameter internal thread (take a variety of the same filters UV, CPL, starlight mirror, gray mirror, close-up lens hood, etc). Fitment: Universal For , Ring is a small to big conversion adapter ring. Transform adapter ring, it can be installed in front of the lens to achieve different diameter share the same lens diameter filter, hood, additional lens or other accessories to achieve the purpose of increasing the lens diameter. and portable, easy to install, and can save money, others can also improve some of the hidden corners of the problem;