A magic match was a one-use magic item that produced a small flame on demand.
It was an ordinary copper rod some 3 inches (7.6 centimeters) long. They were typically sold in batches of 20 and stored in small, engraved, wooden boxes.
A brief command word caused a small flame to ignite at one end, which could be used to burn or ignite. It could not be extinguished by wind or water, but burned only briefly and worked only onced.
Afterward, Daltim Flamefist and other Faerûnian mages studied the magic matches and reverse-engineered a means of making them. Daltim wrote details of the magic match in his spellbook Daltim's Tome of Fire, which he lost in Tethyr in the 1360s DR.