Specification: Grade A Material: bamboo Moisture Content less than 6% Fixed Carbon More than 65% Ash 4% Heat value 7000J-8000J Volatile Matter 2% Hardness 90% Temperature (Burning) 700-880�°C Burning Time 4-5 hours Others feature smokeless, odorless,innocuity, no bursting it is environment-friendly products , no any chemicals Length:18-25cm