I designed this because the temperature probe wires on my smoker tend to either get hung in the latch door or hang all over the place. This fizes the issue and keeps them where I want them. It is magnetic and holds them well.

You will need 4x) 6mm by 2mm magnets. like this or this. They are a snug fit and should snap in, but I used a dot of super glue for longevity.

PLA may be ok for an insulated chest style smoker. For any non insulated where you will be using it on a really hot surface I would use PETG at a minimum.

Print it standing up with the "U" facing down as seen in the slicer pics above. Brims and supports are optional. It still uses less than 3 cents worth of filament and 6 minutes with a brim and supports in the magnet holes though.