The Razer Doubleshot PBT Keycap Upgrade in Mercury White is a high-quality upgrade kit for keyboards, specifically designed by the popular brand Razer. The keycaps are made of durable PBT material in a sleek white color, providing a visually appealing and unique look to any keyboard. The English language layout ensures compatibility with standard keyboard layouts, making it easy to transition to this upgrade kit for a seamless typing experience.