Nitinol Springs - SMA springs in tension or compression versions

Niti Tension Springs, (Item #3-642) SRP $41.95 Tension - When cool, can be extended to 14 cm. Heated, contracts to 29 mm overall. With 350 gram hanging mass shrinks from 60 mm long coil (cool) to 30 mm long (heated) with 2 Amps. 6 mm coil, 750 µm wire, activates at 45-55° C. Four pieces per pack. Use several in series for greater distance, or in parallel for greater force. Sold in a 4-Pack
Niti Compression Springs, (Item #3-657), SRP $41.95 Compression When cool, can be pressed down to 16 mm. Heated with 3 Amps, it extends to 30 mm with over 4 Newtons of force! 8 mm coil, 950 µm wire, activates at 55-65° C. Sold in a 4-Pack