Size -70-90cm, Shape: Six hexagonal, Color: Brown/ Grey Black, Moisture Contain: 1.26% (w/w), Caloric Value: 3616Kcal (w/w), Ash contain: 13.85% (w/w), Volatile Matter: 68.54 %( w/w), Fixed Carbon: 16.35 %( w/w), Raw Material: Rice Husk, Status: Breakable, Sulfur Contain: 0.65 (w/w) and High density. So 100% natural and not use any Chemical. according to buyer desire