With complete box spring mattress king production lines and experienced employees, can independently design, develop, manufacture, and test all products in an efficient manner. Throughout the whole process, our QC professionals will supervise each process to ensure product quality. Moreover, our delivery is timely and can meet the needs of every customer. We promise that the products are sent to customers safe and sound. If you have any questions or want to know more about our box spring mattress king, call us directly.