A Pack of 6 CobbleStone charcoal briquettes. Made out of coconut husks – each stone is 130mm in diameter / 35mm in thickness. Built-in firelighter consisting of barium and sodium nitrate with the rapid ignition technology applied to our Cobble Stone, the charcoal takes seconds to light, without the aid of a firelighter. Once lit, it takes approx. 3 minutes to stop smoking and is ready for you to start cooking in 5 minutes.