CatBed is a PEI flexplate. Comes with magnet sticker.

These use a high quality Japanese PEI, and 0.5mm spring steel. Come with Magnets.

Comes in 125mm, 180mm, 255mm, 305mm, 355mm.

If you're printing PETG, it will become one with the PEI and trash it. Use a release agent, e.g. a decent coating of Cat Vomit or glue stick.

Rated to 120C.

Not sure if you need a magnet? Tough, the cost price difference is so tiny, you get one anyway :D Other customers use them for other things: