Fire Resistant: endure high temperature or fire without burning or distortion. Super strong: 4 times strength than normal stainless cash box. Endure hammering without damage and distortion, ensure banknote¡¯s safety. Good fatigue resistance: 1.5 times fatigue resistance than stainless steel, long service life. Light weight: 1/4 weight of same thickness steel, more convenient for handling and transit. Nonmetallic material successfully avoids electron screening effect, convenient for electronic management. Series of cash boxes with various sizes and capacity, more convenient for management.