Nitinol Compression Spring

Compression Spring ­ When cool, can be pressed down to 16 mm ( 5/8" ). Heated with 3 Amps, it extends to 30 mm (1-1/4") with over 4 Newtons of force! 8 mm (5/16") coil, 950 µm (.04") wire, activates at 55-65° C equivalent to (131-149° F).