The product is a set of three Martin M1221C straight tooth miter gears, each with 21 teeth and a pressure angle of 20 degrees. This specific gear model is manufactured in the United States by the reputable brand Martin, known for producing high-quality and durable industrial components. Miter gears are used in various industrial automation and motion control systems for mechanical power transmission, making these gears an essential component for precise and efficient operation in a wide range of applications.