Ash Color light grey, Odorless, Bold, Tearless, Smoke free, No chemical and no wooden, long hour burning, no spark, fast ignition, odorless, tearless. (Grade A) Smoke free, No chemical and no wooden, long hour burning, no spark, fast ignition, odorless, tearless.(Grade B) Ash Color light grey, Odorless, Bold, Tearless, Smoke free, No chemical and no wooden, long hour burning. (Grade C) Ash Color light grey, Odorless, Bold, Tearless, Smoke free, no spark. ( Grade D )