Electromagnetic Solenoid Identification and Sourcing Larger Size for Sculpture Project

Hello,
I am a student from USA currently spending a semester in Prague, CZ studying sculpture. I am working on a project that uses the component linked below. What is this called???? I think it is some electromagnetic toroid. The inner part moves up when electricity is moving through it, and falls back down when there is no current. I can't find anything like it on the web. I'm looking for something like this but a little larger. This component only raises like .5cm, and I would like it to raise around 2cm.

Thanks!

It's more likely a *solenoid* -- based on Sara's description:

bq). The inner part moves up when electricity is moving through it, and falls back down when there is no current.,

I suppose it could function as a vibrator if feed a square wave signal of the proper frequency but I suspect that would be a secondary application.

Colin, was that a guess, or do you actually recognize it?

Yes, it does appear to be a solenoid! Thank you!

Ledex & Dormeyer Products show over 200 variations of solenoid, AC, DC, various voltages, push or pull on, various strokes up to about 2 inches. They can probably supply you with the exactly what you are looking for. They are distributed in CZ by Johnson Electric and I found a CZ contact..http://www.johnsonelectric.com/en/contact/our-distributors-manufacturer-reps-detail.html?country=Czech Republic
Good Luck!