3J58 is mainly used for elastic sensitive parts under tension, bending and compression stress and frequency sensitive parts under longitudinal or bending vibration mode, such as various sensitive parts and pressure sensors that need constant elastic modulus or frequency, signal torque and flexible head of flexible snail. 3J58 can also be used for diaphragm, diaphragm box, etc. Bellows, vibration cylinder, precision spring, filament ultra mechanical filter, etc.