Our Metallurgical / Foundry / Forge Coke is made from original Bituminous coal, producing the purest cleanest, lowest clinker, and hottest burning fuel available. No smoke, no smell, no soot. Our Coke is especially processed and sized to be used in in the iron and steel industries. Sized at 1/4 x 1 inch, max 5% plus 1 inch, 12% minus 1/8 inch. Carbon 91%, Vol. 1%, Ash 8%, Sulfur 0.7%, Moisture 12% max.