tc temperature cct ss 316l coil clapton

First, sorry if this is not the place for this question, i'm new here, i beg a pardon... Quite a noob but trying to learn. I've reccently bought the coils in the pic above (Clapton SS i suposse) . Are they all SS316L to use TC or they have other material in it? Don't know if is a placebo effect...