There was a roll of white ribbon in the box with the tank. Not sure how many yards in the roll since I used my own.
I found a package of neatly folded string in the bottom of the carton the helium came in. This was after we blew the balloons up and tied on our own ribbon-type string. I do not think we would have used the string that was furnished for our occasion, so, it was no big deal for us. The string looks just fine for a balloon -- be sure you have some sharp scissors! (There's even a picture of a ball of string on the carton, but did not notice it until after the party!)