OpenFOAM-12/tutorials/modules/multiRegion/CHT/heatedDuct/constant/geometry/metalToHeater.stl

solid metalToHeater
 facet normal 0 -1 0
  outer loop
   vertex 0.0075 0 0
   vertex 0.0425 0 0
   vertex 0.0425 0 0.15
  endloop
 endfacet
 facet normal 0 -1 0
  outer loop
   vertex 0.0075 0 0
   vertex 0.0425 0 0.15
   vertex 0.0075 0 0.15
  endloop
 endfacet
endsolid metalToHeater