【Ultra Slim Step Up Ring】 This step up ring allows you to mount an 77mm filter on a 72mm lens 【For 72mm Lenses】 Suitable for camera lenses with a 72mm filter size. The filter size is printed on the front or side of the lens, next to a "ø" (diameter) symbol. Please confirm it before purchasing 【For 77mm Filters】 Compatible with all ø77mm filters, including UV, CPL, ND, black diffusion, graduated color, star, blue streak, and light pollution reduction (filters sold separately) 【Robust Aluminum Alloy】 Black anodized aluminum alloy offers high durability 【Easy to Attach & Remove】 Precise threading ensures smooth installation and removal with just a few twists. Also included is a cleaning cloth for daily maintenance