The Step-Up Ring expands the compatibility range for your filters to fit smaller diameter camera lenses. For example, our 67mm-77mm Step-Up Ring would allow your 77mm Quartz Line filter to fit your favourite 67mm lens. Featuring a deep knurled, CNC machined brass frame for easy mounting and durability.Step-up Ring adapting 72 mm to 82 mmFeaturing a deep knurled, CNC machined brass frame for easy mounting and durabilityThe Step-Up Ring expands the compatibility range for your filters to fit smaller diameter camera lensesPolarpro 72mm-82mm Step-Up Ring