Two Ring Induction Hob Bosch . A copper coil is positioned below the ceramic glass. The best induction hobs to buy. Two Ring Electric Hob in Totton, Hampshire Gumtree from www.gumtree.com Hobs differ not only in size and appearance, but also in technical characteristics. Direct, simple selection of the desired cooking zone, power and additional functions. All you have to do for the perfect meal is turn on the hob.