... shielded requirement.ZRKVVflame retardant, copper core, PVC insulated, PVC sheath, control cable450/7504-370.75-10For laying the fixed place (indoors, cable trench, pipeline etc ... .) that requires flame retardant.ZRKVV22flame retardant, copper core, PVC insulated, PVC sheath, SWA control cable450/7504-370.75 ...