... fastness for long time . The burning implement is made of high strength of alloy steel,(5). Graceful appearance, ... 1000 degrees2. Energy-efficient: 1kg of firewood can burn one hour.3. Clean and Environment friendly: full combustion, no smoke ... firewood, straw briquette forming fuel, the mechanism sticks, machine-made charcoal and ordinary charcoal, twigs, leaves, plant wood processing scrap, corn core ...