3CERA&reg; Large Ferrocerium Rod 1/3"x3.5" Flint Fire Starter Magnesium Tool Kits Camping Hiking Striker tool Ferrocerium rod is made from Iron Magnesium and mostly of an alloy of rare earth metals called mischmetal excellent pyrophoric percentage : 98%min Diameter: 85x 8mm (3.5"x1/3")