[SIZE] - 0.39" (10mm) hex width, 0.43" (11mm) total height. [MATERIAL] - Made of nylon, good toughness, anti-corrosion and non conductive. [USE] - Used with bolts, threaded rods and studs to connect components. Easy to fit and to remove. [ADVANTAGE] - These caps cover nuts provide effective protection against injure and weathering and improve the finished appearance of your product. [APPLICATIONS] - Suitable for mechanical equipment, electronic equipment, communication equipment, hardware lighting and so on. Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thanks!