16mm 2 core aluminium cable price16mm aluminium wire price6mm 2 core aluminium cable price6mm 2 core aluminium wire price6mm aluminium cable price6mm 4 core aluminium cable price6mm aluminium wire price6mm aluminium wire6mm 3 core aluminium cable pricecopper cable price per meter10mm dc cabledc cable pricedc wire pricexlpe pvc cu cable16mm single core cable price16mm copper cablesingle core copper cable wholesale16mm single core copper cable pricesingle core 16mm cablesingle core copper cable manufacturer12mm wire pricecable 12mm212mm cable pricesingle core electrical cablesingle core electrical cable supplierssingle core electrical cable manufactures