Box of charcoal discs: Each of these boxes contains 80 Excelsior Swift-lite charcoal discs or tablets for incense burning. The tablets are packed in rolls of 10 and are sealed in airtight packets to maintain good combustion properties. To further maintain this freshness, opened rolls should be re-sealed and kept in a cool dry place. These tablets are quick lighting and long burning. Make sure to follow the instructions on the packet.