modifier block back.stl

solid OpenSCAD_Model
  facet normal -0 0 1
    outer loop
      vertex 0 50 60.8
      vertex 50 0 60.8
      vertex 50 50 60.8
    endloop
  endfacet
  facet normal 0 0 1
    outer loop
      vertex 50 0 60.8
      vertex 0 50 60.8
      vertex 0 0 60.8
    endloop
  endfacet
  facet normal 0 0 -1
    outer loop
      vertex 0 0 0.8
      vertex 50 50 0.8
      vertex 50 0 0.8
    endloop
  endfacet
  facet normal -0 0 -1
    outer loop
      vertex 50 50 0.8
      vertex 0 0 0.8
      vertex 0 50 0.8
    endloop
  endfacet
  facet normal 0 -1 0
    outer loop
      vertex 0 0 0.8
      vertex 50 0 60.8
      vertex 0 0 60.8
    endloop
  endfacet
  facet normal 0 -1 -0
    outer loop
      vertex 50 0 60.8
      vertex 0 0 0.8
      vertex 50 0 0.8
    endloop
  endfacet
  facet normal 1 -0 0
    outer loop
      vertex 50 0 60.8
      vertex 50 50 0.8
      vertex 50 50 60.8
    endloop
  endfacet
  facet normal 1 0 0
    outer loop
      vertex 50 50 0.8
      vertex 50 0 60.8
      vertex 50 0 0.8
    endloop
  endfacet
  facet normal 0 1 -0
    outer loop
      vertex 50 50 0.8
      vertex 0 50 60.8
      vertex 50 50 60.8
    endloop
  endfacet
  facet normal 0 1 0
    outer loop
      vertex 0 50 60.8
      vertex 50 50 0.8
      vertex 0 50 0.8
    endloop
  endfacet
  facet normal -1 0 0
    outer loop
      vertex 0 0 0.8
      vertex 0 50 60.8
      vertex 0 50 0.8
    endloop
  endfacet
  facet normal -1 -0 0
    outer loop
      vertex 0 50 60.8
      vertex 0 0 0.8
      vertex 0 0 60.8
    endloop
  endfacet
endsolid OpenSCAD_Model