3 Ply Fine, 6 Ply medium, 9 Ply heavy 20m on spool This special ESP blend of PVA string has an extra loose weave which allows water to penetrate between the filaments ensuring rapid meltdown without residue. - These strands can be further separated into finer lengths for even faster dispersal. To cover all requirements this PVA string is available in: 3 Ply Fine - Best suited to short range and very low water temperatures. 6 Ply Medium - A good, all round string for varying water temperatures. Capable of supporting 3-4 baits for castingup to 70 yards. 9 Ply Heavy - Extremely strong. Will allow distance casting with very heavy stringers.