Centrifugal casting (high speed, single axiis casting of white metal or cold resins, aka 'spincasting') or Rotocasting (slow speed, bi-directional cold resin casting) are processes most manufacturers use to produce Urban Vinyl toys - at least, the ones specifically made out of polyurethane. Spincasting produces solid casts, rotational casting (rotocasting / rotacsting) creates hollow casts.