Precision workbench size of 400x400x13MM with a flatness of 0.1MM, ensuring accurate measurements for experiments. Constructed with durable anodized aluminum, this optical plate is designed for long-lasting use and easy maintenance. It features high rigidity and low mass ratio, which improves the accuracy and stability of experimental setups. Versatile use as a breadboard, scrubbing board and for various optical equipment, making it ideal for both laboratory and home decoration. Package includes an experimental fixed flat plate with M6 opening, perfect for scientific and woodworking applications.