Siemens ER 74 250 MX gas hob with integrated controls New gas hob with integrated controls in stainless steel. New product family. The product features two newly developed wok gas burners which direct the heat in two different directions. This is particularly suited to “wok cooking”. The stainless steel topsheet is exceptionally flat in form, ideal for the cleaning that gas hobs in particular require. The primary air is drawn through the rear “spoiler”, a particularly distinctive design feature. In addition to their practical function, the “trays” formed by the stainless steel also serve to maintain the hob’s rigidity when hot