These are genuine Campingaz replacement mantles in size S (small), supplied as a pack of three. The mantle is the small fabric sock on a gas lantern that glows brightly once it has been burnt in, and it becomes very fragile after the first lighting, so it is worth keeping spares in the camping box. This size fits Campingaz Symphony, Super Symphony and Frontier CPS gas lanterns. To fit one, tie it onto the burner of a cold lantern, burn it off once with a match to form the ash structure, then light the lantern as usual. Handle used mantles as little as possible.