Feature:1. Selected imported aerospace aluminum, adopts high accuracy CNC machining center precision processing. 2. Solid, stable, wear-resistant, galvanic baking paint. 3. flannel surface planted inside, will not scratch the lens body. 4. Fits Canon 70-200mm f2.8L one two three generations of other lenses. 5. Good workmanship, reliable connection, ensures the safety of the lens during use. . Metal Lens Mount Ring Stop . Metal Lens Mount Ring Stop Item Type: Lens Mounting Ring Material: Aluminum Alloy Color: as shown in the pictures Quantity: 1 piece Suitable lens: For Canon 70-200mm F2.8L USM For Canon 70-200mm F2.8L IS USM anti-shock For Canon 70-200mm F2.8L IS II USM Anti-Shaking 2nd Generation For Canon 70-200mm F2.8L IS III USM 3rd generation shockproof For Canon 100-400mm F4.5-5.6L 1st generation (2nd generation cannot be used) For Canon 300mm F4L IS For Canon 35-350 mm F3,5-5,6L Weight: approx. 142g Wheel diameter: approx. 77 mm/3,03 inch . Metal Lens Mount Ring Stop . Metal Lens Mount Ring Stop Package List:1 x Lens Mount Ring . Metal Lens Mount Ring Stop . Metal Lens Mount Ring Stop Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.