Intermediate size burner base (medium) House, Teka, Ariston, Fagor. Gas cooker piece. This is the spare part on which the burner cap.
Model #2
Medium size: 6.8cm
ARISTON, ASPES, BALAY, BOSCH, BRANDT, BUILD, CREDA, CROLLS, EDESA, FAGOR, HOTPOINT, INDESIT, LYNX, MASTERCOOK, NEFF, SCHOLTES, SIEMENS, SELL FAST. For gas cookers.