Compatibility - Perfect fit for Lenovo Preferred Pro Keyboard; Lenovo Preferred Pro II Wired External USB Keyboard 4X30M86879; Lenovo External Wired USB Preferred Pro USA Keyboard 73p5220 41A5289 89P8530 41A5289 SK-8825 54Y9400 KB1021. Please check the photo to confirm compatibility with your keyboard model. Premium grade silicone - Made from premium engineering grade silicone; every key is specially molded for a precise fit and lasting durability. Soft, flexible, and eco-friendly. Full keyboard protection - All-around protection for each key. Waterproof, dust-proof and dirt-proof design helps prevent liquids, dust, cigarette ash, and biscuit crumbs from reaching the keyboard and shortening its life. Ultra thin - Ultra-thin 0.13 mm; minimizes typing interference. Flexible and easy to apply or remove for cleaning or disinfection. Can be folded for packing in a backpack. Use scenarios - Office or home workspace: keeps keys clean and protected from spills, dust, and crumbs while preserving typing feel. - Travel or commuting: slim, packable protection that fits in a bag without adding bulk. - Cleaning and disinfection: easy to remove and reapply for quick keyboard cleaning.