Restringing service goes for any doll whose stringing has been stretched out and therefore their limbs are not tight and not holding the doll's poses.  
This is for simple constructed dolls with wide access areas strung together with hooks or crimp beads.  It does not include fully hard body vinyl dolls, jointed dolls, dolls with multiple limb plates or neck plates, dolls with small hole limb access or head access, or BJD dolls.
Single hospital dolls will have materials (elastic) included.  Multiple doll hospital orders must purchase a restringing kit along with their order.