Totally TOXIN-FREE Product. Size of each cavity is 2.5cm.,Unparalleled in heat retention: Pure iron ore material heats quickly and also retains heat for longer, saving cooking gas. Heavy gauge construction for extra thickness and durability. Perfect round cavities/holes: Easy to prepare golden & crispy Paniyarams, Appam, Bondas, Koftas and more. Adds an authentic and rustic flavour to your preparation.,Ideal for outdoor cooking and campfire; can handle high-heat cooking as well as direct contact with flames.