This IS a tube - hollow tubing, for stringing, i.e. jelly bracelets or slide over memory wire! Happily accommodates lampwork or other large hole beads. Includes instructions and the closing connector. Instructions read in part as follows: The provided connector material is designed to be cut with standard scissors into 5 or 6 pieces about 1/4 to 3/8 inches long. After cutting the connector to the desired size, insert it halfway into the hollow Jewelry Tube opening. To close the loop, simply slide the other end of the tubing onto the connector until the two tube ends come together. Holds securely without unsightly knots! (The connector and instructions are inside the cardboard header on the package. Don't throw that out.)
2mm By the pack of 5 yards.