Anti Dust Waterproof Silicone Keyboard Protector Skin Cover for Dell Keyboard KB212-B KB4021 US Version (Blue) Made for Dell Keyboard KB212-B KB4021 US Version only. Keyboard not included. Waterproof and dustproof, protect your keyboard against everyday spills (coffee/beer/milk), dust (crumbs/powder), liquid, pet's pees or the other incidents High quality silicone material, durable, healthy and environment friendly Prevents keyboard keys from general wear and tear caused by everyday use. Removable and washable, the free cleaning without affecting the effectiveness of its use.