This is a request for information about custom CNC service, metal aluminum brass copper stainless carbon steel plastic engineering precision customized OEM machining parts. It appears that the manufacturer or supplier wants to provide specific technical specifications for these types of parts. These specifications could include things like dimensions, tolerances, finishes, and materials used. They may also specify requirements for manufacturing processes and quality control procedures. Without more context or information about what type of products you need, it's difficult to give more specific answers.