Specification :
Grade A : Size 2,3X5 cm
The Color of ash is Light Grey , Long Flame until +/- 4 hours , Ash content around 4% until 6% , Calori High
Grade B : Size 2,3X5 cm
The Color of ash is Pallid Grey , Long Flame until +/- 4 hours , Ash content 6% to infinity , Calori Middle
