Iron or non-alloy steel; bars and rods, hot-rolled, in irregularly wound coils

721310 Iron or non-alloy steel; bars and rods, hot-rolled, in irregularly wound coils, containing indentations, ribs, grooves or other deformations produced during the rolling process 721320 Iron or non-alloy steel; bars and rods, hot-rolled, in irregularly wound coils, of free-cutting steel 721391 Iron or non-alloy steel; bars and rods, hot-rolled, in irregularly wound coils, n.e.c. in heading no. 7213, of circular cross-section measuring less than 14mm in diameter 721399 Iron or non-alloy steel; bars and rods, hot-rolled, in irregularly wound coils, n.e.c. in heading no. 7213, of circular cross-section measuring 14mm or more in diameter