Beadalon 49-Strand Bead Stringing Wire, 0.018-Inch, Bright, 100-Feet The size is medium 018 Diameter 5.08 cm The spool contains 100 consecutive feet (31 m) of the bead solid core Greater flexibility Larger pleats Kink greater resistance Maximum Flexibility Maximum Drape Maximum Kink Resistance Maximum Abrasion Resistance