Is this a steel throwout bearing?

Hi guys, just got my SPEC stage 2 clutch from partshopper. Just want to add too that I got a great deal on it with the stangnet promo code plus free shipping & handling, you can't beat it. Now onto my question, I contacted SPEC and they said all their throw out bearings are made of steel. I was under the impression that all of their kits came with them so I didn't think to ask partshopper if theirs came with a steel one. The outter lining thing on mine is plastic, but i'm not sure if you guys refer to the inner part being steel? or the whole thing being steel?





Thanks,
Ted