CMD6604061 20 Core Unscreened Industrial Cable, 0.22 mm² Black. The terms unscreened and screened in regards to cables will provide various purposes for the user. The first will be the price. As screened cables offer excellent protection in situations where cables may be trodden on or be bashed around. Unscreened cables however still have the protective PVC sheath over the cores and are still well sheltered from many outcomes, without the price of a screened version.