... for medium heavy materials, threads up to 15/3-ply synth.,needle size Nm in 1/100 mm: 110 to 140C ... for medium heavy materials, threads up to 10/3-ply synth.,needle size Nm in 1/100 mm: 160 to 200D ... for heavy materials, threads up to 8/3-ply synth.,needle size Nm in 1/100 mm: 160 to 200L ...