The burners Series II HE 2.1 are the natural evolution of the more widespread Series II. This new version allows those that already used the Series II, to greatly enhance the efficiency of their cooking hobs without any additional cost. Simply replacing the flame spreader and the related cover, without modifying anything else, you can in fact reach even 68% of efficiency. Sabaf customers, then, will have the possibility of sensibly increasing the global efficiency either of their cooking hob or of their free-standing cooker free of charge, without any technical modification of the hob or of the grids.