Simple stackable temp tower fro any type of filament test ranging from 170C to 280C.
Each block is 20mm tall. Just stack them up in your slicer and print it. You can choose a with a 5C or 10C increment.
You can also print this with 5 top / bottom layers and 0% infill. The top layers will be a second bridging test in a 90 deg direction.