Compatibility: The reversible bayonet lens hood is designed for EF 70-200mm f/4L IS USM Lens. | Replacement: Replace ET-74 lens hood. | Flexibility: Ф67mm filter and Ф67mm lens cap are allowed to attach. | Professional Design: Non-glare matte finish on the interior surface to further prevent or limit lens flare. No vignetting with the hood on. | Protection: Protects your lens from accidental impact and the elements.