Specification Brand : FREEWELL BulletPoint1 : What problems does it solve? Step Up rings are very common but this is unlike other this innovative step-up ring from Freewell is magnetic as well as thread filter system so you can now use Freewell magnetic filters as well as your threaded filters in one step-up ring. BulletPoint2 : Built: Made of CNC machined aluminum with black color to avoid any reflection or leakage during your photography. BulletPoint3 : How do I find my filter thread size? Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel. Please do make sure to order the correct size otherwise it will not fit on your camera lens. BulletPoint4 : Compatibility: Compatible with all 55mm camera lenses & 72mm accessories. BulletPoint5 : 25 YEARS SUPPORT: Our step up adapter ring is made up of high quality material brass, which will surely sustain for more than 25 years. ExternallyAssignedProductIdentifier1 : 685757791434 ExternallyAssignedProductIdentifier2 : 0685757791434 FocalLengthDescription : 49 mm ItemName : Freewell Step Up Filter Adapter Ring 55mm-72mm (Works with Freewell M2 Magnetic Quick Swap as Well as Your Threaded Filter) ItemPackageDimensions_Height : 10.5 centimeters ItemPackageDimensions_Length : 2.3 centimeters ItemPackageDimensions_Width : 10.3 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-filter-step-up-rings Manufacturer : freewell Material : Aluminium MaxFocalLength : 49 millimeters MinFocalLength : 49 millimeters ModelNumber : FW-SU-55-72 PackageLevel : unit PartNumber : FW-SU-55-72 PhotoFilterEffectType : Ultraviolet PhotoFilterThreadSize : 55 millimeters ProductDescription : Step up rings are a well-known thing and are commonly used. However, you will attach both Freewell magnetic filters and standard threaded filters to this ring. The Freewell ring is made of high-quality aluminum with a black finish to prevent any unwanted light. reflection during shooting. The lens thread size will be indicated under the lens cap or on the lens body. Make sure that the ring size you ordered is correct. Otherwise, unfortunately, it will not fit your lens. ProductSiteLaunchDate : 2019-09-06T09:13:43.682Z Size : 55-72mm SupplierDeclaredDgHzRegulation : not_applicable WaterResistanceLevel : not_water_resistant