Sharkâs dual-drawer air fryers have proved to be the most flexible way of cooking, but the one issue with them is their size: the Ninja AF400UK is a beast of a machine, taking up a lot of counter space. The Ninja Double Stack Air Fryer uses a new vertical design, so you get the same amount of cooking space but in a thinner appliance that takes up less room. Shark will sell two versions of the Double Stack: the
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