  In this paper, we provide a structure theorem and various characterizations
of degradable strongly entanglement breaking maps on separable Hilbert spaces.
In the finite dimensional case, we prove that unital degradable entanglement
breaking maps are precisely the $C^*$-extreme points of the convex set of
unital entanglement breaking maps on matrix algebras. Consequently, we get a
structure for unital degradable positive partial transpose (PPT-) maps.
