For Canon RF 70-200mm F4 L IS USM Camera Lens Bayonet Mount Ring

1. Replacement for your defective or breakdown part.2. Design for Canon lens. the design makes it firmly on the lens.3. You can put one lens reverse mount on another lens (front).4. Completely fit and work.5. Professional installation is highly recommended. We will not be responsible for any damages to your camera that you may cause during the changing of replacement parts.