  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_* of order of 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 >> 1.
