Experience superior heating performance with this premium anthracite coal, perfectly sized for coal burning stoves. This high-quality anthracite nut coal features irregular chunks of clean, sized anthracite that delivers exceptional heat output. Each 25-pound package contains ready-to-use anthracite nut coal that requires no assembly. The coal pieces come in a convenient 12" x 12" x 6" package, making it easy to store and handle. Ideal for home heating, cabin warming, and forging applications, this anthracite nut coal provides intense, long-lasting heat.. This manually operated fuel source comes with a limited warranty and is perfect for those seeking dependable, high-performance heating solutions. Always follow local fire and safty regulations and standerd and local safety protocols when using this product. Some boxes in the first 150 boxes may have a bigger piece for souvenir, It can be burned. When burning anthracite nut coal indoors be sure to use proper coal burning stove with proper ventalation in accordance to local fire codes.