Products shape; - Hexagon dia 42 ~ 45 mm x 8 cm and 10 cm length - Rectangular 25 x 40 x 5 cm and 10 cm length Our product advance feature; 1. Pure charcoal 100% (no co co fiber dust, no wood) 2. No chemical or additive add in 3. Smokeless 4. Odorless 5. Ash less (4%) 6. No spark 7. Burn period 3 hrs. 8. 7,250 kcal/kg heating value