Effectively Prevents Dust: The universal keyboard cover is mainly used for standard-sized desktop computers. The keyboard film can effectively prevent water or other stains from penetrating. Keep the keyboard surface clean. Durable Material: The keyboard dust cover is made of high-quality silicone, soft and comfortable, and will not damage the computer. Environmental protection, durability, and long service life. Easy to Use: The computer keyboard cover has an ultra-thin transparent design, even if it is covered on the keyboard, the letters can be seen clearly. Does not affect normal typing and other usage. Perfect Fit: The waterproof keyboard cover is superbly designed, neither too big nor too small. The keyboard cover fits perfectly on the keyboard and is not easy to remove. Satisfactory Packaging: You will receive 4 pcs silicone keyboard covers with size 44.5 x 13 cm. If the quantity is sufficient, you can replace old or dirty keyboard membranes.