Appearance: black briquettes Usage: suit for special smoking set, Ignition: can be used directly after lighted,quite convenient; Moisture: 5% Volatile matter: 23.1% Ash content:13.5% solid charcoal: 64.87% Calorific value: 7000--7500CAL min Sizes: normal sizes:33mm,38mm,40mm,or according to customers' requirements; Usable range: special smoking set,can be used directly after lighted. 10 pieces/roll, 10rolls/box, 24boxes/carton.