Designed for the small family kitchen, the 60cm PM631STGB has 3 burners & 1 electric zone to provide plenty of cooking space. For safety, the Flame Failure device automatically cuts the gas in case of leak. The Newmatic tempered glass top is easy to clean and carries a lifetime warranty. The knobs are made of zinc alloy and completely melt proof. Heavy duty cast iron trivets are sturdy & durable.