template Wafer(200)
  char speci
  int det
  parent LayerSiB
  int lyr
  int nwaf     ! used only for speci=SPC, but ALWAYS present.
  real tilt
  int nstrip
  real c0x
  real c0y
  real pitch
  real stereo
  real eff_hit
  real siga
  real sigb
  real sigc
end template