These PCB are a pair (that's right two!) replacement heat plates for the excellent opensource PCB hotplate that the fantastic c0pperdragon designed and used to sell. The story is I used mine loads and the original PCB eventually gave up. As the original project is opensource I’ve got a batch of replacements manufactured and am putting a few of the spares on here in case they are of use to others. I’ve chatted with c0pperdragon and they are totally happy for me to do so.

Oh yeah, the replacements are yellow, I dunno why, just fancied it :)

Note, the lower deck and electronics of the PCB hot plate are not included, this is just the upper plate with no fixings.