We present a weak-coupling Yang-Mills model supporting non-Abelian magnetic flux tubes and non-Abelian confined magnetic monopoles. In the dual description the magnetic flux tubes are prototypes of the QCD strings. Dualizing the confined magnetic monopoles we get gluelumps which convert a “QCD string” in the excited state to that in the ground state. Introducing a mass parameter $m$ we discover a phase transition between the Abelian and non-Abelian confinement at a critical value $m=m_{*}\sim \Lambda$. Underlying dynamics are governed by a $Z_N$ symmetry inherent to the model under consideration. At $m>m_{*}$ the $Z_N$ symmetry is spontaneously broken, resulting in $N$ degenerate $Z_N$ (Abelian) strings. At $m<m_{*}$ the $Z_N$ symmetry is restored, the degeneracy is lifted, and the strings become non-Abelian. We calculate tensions of the non-Abelian strings, as well as the decay rates of the metastable strings, at $N\gg 1$.

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