The iPhone 11 was a previous generation model, and various screen protectors were available from different manufacturers, including official ones from Apple.

To find the original or premium screen protector for the iPhone 11, you can visit the official Apple website or authorized Apple retailers. They should have a selection of certified accessories, including screen protectors, that are specifically designed for the iPhone 11.

When choosing a screen protector, consider the following factors:

1. Material: Look for high-quality materials such as tempered glass or military-grade film for optimal protection.

2. Compatibility: Ensure that the screen protector is designed specifically for the iPhone 11 to fit its display dimensions and features accurately.

3. Reviews: Check customer reviews and ratings to see what other users think about the product's quality and ease of installation.

4. Installation: Some screen protectors can be tricky to apply correctly, so you may want to look for ones that come with installation tools or have a straightforward application process.

5. Warranty: Check if the screen protector comes with a warranty against defects or premature damage.

Since the iPhone 11 is not the latest model, availability of original screen protectors from Apple may still be possible, but it could be limited. However, there are reputable third-party brands that offer high-quality screen protectors for the iPhone 11.

Always ensure you are purchasing from authorized retailers or official channels to avoid counterfeit or low-quality products. Checking customer reviews can also provide insights into the performance and durability of various screen protectors available for the iPhone 11.