Introduction Canon E-145D Lens Cap for EF 200-400mm f/4L IS USM The Canon E-145D Lens Cap for EF 200-400mm f/4L IS USM helps to protect the front lens element from dust, dirt, moisture, and other elements during travel and storage. This lens cap is specifically designed for the Canon EF 200-400mm f/4L IS USM lens due to its large, threadless design. Fits Canon EF 300mm f/2.8L IS II USM Lens. Key Features: For Canon EF 200-400mm f/4L IS USM Lens Offers Protection for Front Lens Element What’s in the Box: Canon E-145D Lens Cap for EF 200-400mm f/4L IS USM