Specification Brand : Benro BulletPoint1 : 77mm Lens mounting ring for Fh100 filter holder BulletPoint2 : Precision machined BulletPoint3 : All Metal BulletPoint4 : 4. Applicable to Canon Lens: EF 300mm f/2.8L IS II USM, EF 200-400mm f/4L IS USM EXTENDER 1.4X, EF 400mm f/2.8L IS II USM, EF 500mm f/4L IS II USM, EF 600mm f/4L IS II USM, EF 800mm f/5.6L IS USM (The distance from tripod mount ring to camera bayonet meets the installation requirements after testing) BulletPoint5 : 5. Package includes: 1 x Lens Tripod Mount Base IS-THC856 for Canon Lens; 1 x Quick Release Plate QS-120; 1 x Lens Support IS-TB01 (Note: The other items in the photos not listed here are for illustrating only, not included) Color : Black CompatibleDevices : Camera ExternallyAssignedProductIdentifier : 5056020290940 ExternallyAssignedProductIdentifier1 : 6931747329670 ExternallyAssignedProductIdentifier2 : 06931747329670 ExternallyAssignedProductIdentifier3 : 00886235206024 GpsrSafetyAttestation : 1 IncludedComponents : Storage Case ItemName : Benro Master 77mm Lens Mounting Ring (FH100LR77) for Benro Master 100mm Filter Holder (FH100) ItemPackageDimensions_Height : 15.748 centimeters ItemPackageDimensions_Length : 1.27 centimeters ItemPackageDimensions_Width : 11.938 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : tripod-lens-mount-rings Manufacturer : MacGroup Material : Metal ModelName : Holder ModelNumber : FH100LR77 NumberOfItems : 1 PartNumber : FH100LR77 PhotoFilterThreadSize : 77 millimeters ProductSiteLaunchDate : 2017-01-11T14:59:41.609Z Size : full-size SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredDgHzRegulation1 : unknown SupplierDeclaredDgHzRegulation2 : unknown SupplierDeclaredDgHzRegulation3 : unknown SupplierDeclaredDgHzRegulation4 : unknown SupplierDeclaredDgHzRegulation5 : unknown UnspscCode : 45121600 WarrantyDescription : 5 Year Limited Warranty WaterResistanceLevel : not_water_resistant