2 Pcs 5 Feet Shape Memory Nitinol Wire 1.0 mm 40° C (18ga 104 °F) Pre Trained Wire Nitinol Shape Memory Alloy for Research Labs Classroom Display

The pieces I recieved are like tempered steel. Very springy and difficult to bend. However, when bent within the requisite temperature range they do NOT return to the original shape when heated or cooled, as real nitenol should.

Used for a science experiment and it was very cool.

Not Nitinol. Does not work. Too late to return.

It is memory wire but it doesn't straighten at 40C (or even 90C) It will mostly straighten if heated with a propane torch.

This worked great for building a diy antenna, it's a bit difficult to work with so make sure you have a decent cutter and a good way to crimp into place.

It is preset straight. Won’t reprogram when heated. Not a wood sample. Not worth the money

Great NiTi wire! I like that it loses its strength when exposed to temperatures below 0 degrees Centigrade to -40℃, and it's like a solder wire when it's already at -4 to -7℃. The wire is high grade, light, and has a dark shiny, pewter-like color with a high superstrength sprig-like feature. What a bargain!

I got this demo of some "space age" materials in STEM class. 2X the samples you can buy of US-made materials. Remarkablely springy material. It was fun to experiment with this exotic wire.