Part number : KPG0402 - flush mount or top mount gas cooktop.
Part number : ICG0402 - integrated in an 4mm inox worktop.

Burners (L-> R):
1x5.8kW Wok burner
1x3.0kW Power burner
1x1.7kW Normaal burner
1x5.8 kW Wok burner

Dimension cooktop : 1130x520x4 mm in brushed inox 304
Dimension housing : 1100x485x95

Downloads:
The dimensions of the cut out for the flush mount cooktop are listed in the general KOONAKA leaflet.