Safe and economical, Cobb Cobblestones ignite completely in two minutes and are ready to cook on in 5 minutes. Made from coconut husk, they burn longer and hotter than conventional wood charcoal - one Cobblestone gives up to 2 hours cooking time when used in a Cobb BBQ. After 2 minutes of ignition, it burns smoke-free.Suitable for use with COBB Premier, Pro, Compact and Supreme models Ready to cook in 7 minutes from lighting Provides over 2 hours cooking time Made from Coconut husk Burns hotter and longer than conventional wood charcoal     Dimensions: (H)3cm x (Dia)13cm eachWARNING: Carbon Monoxide hazard - suitable for outdoor use only - never ignite and use indoors