Take Japan SUS304 spring special stainless steel wire as raw materials manufactured by special technology. Feature in good flexibility, not easily distorting. There are 4mm and 5mm of width so far, and also two methods for manufacturing steel ends. One is stainless steel, the other one is rubber-coving (cover soft rubber on the two ends, which feature in softer, comfortable and better flexibility than stainless steel end, without point-pressing feeling on human, has certain caring function.).
