template FTrk(100)
  int det
  char name
  int nlyr
  child LayerFTRK
  real xmin
  real xmax
  real ymin
  real ymax
  real z0
  real zlen
  material mat_fill
  real thick_boun(6)  ! xmin, xmax, ymin, ymax, zmin, zmax
  material mat_boun(6)    ! xmin, xmax, ymin, ymax, zmin, zmax
  real siga
  real sigb
  real sigc  
end template