... .18mm ,7*0.20mm or 7*0.24mm copper,tinned copper or CCA,stranded,shield or unshielded,good PVC, ... LZSH PVC.conductor :bare copper or tinned copper or CCA or CCS conductorinsulation: PVC flame proof ... or common PVC insulationcable core:4C,6C,8C,etc ... or security system. fire alarm cables 8 core with high quality