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Tosuny Lens Mount Ring Tripod Collar Mount Ring For Canon Ef 70 200Mm F/4L Usm, For Canon Ef 70 200Mm F/4L Is Usm, For Canon Ef 300Mm F/4L Usm, For Canon Ef 400Mm F/5.6L Usm Keyboards & Mice Whether you are a busySpecification: Condition: 100% Brand New Material: Aluminum Alloy Color: Shown As Pictures Base Mount Interface: Unc 1 4Inch Diameter: Approx. 7Cm 2. 7In Inner Diameter: Approx. 6. 5Cm 2. 5In Weight: Approx. 122G Packing List: 1 * Lens Tripod Mount Ring Other Devices On Pictures Are Not Included.