alarm cable 4x0.22mm ,(4 core ,7/0.20 copper, 305m/roll)designed for intruder alarm systems with good quality and competitive alarm cable ... 4x0.22mm ,(4 core ,7/0.20 copper, 305m/roll) Cable ... cores, in white outer sheaths, with rip-cord. The cores are made from 7 strands of 0.20mm annealed tinned copper, plain bare ...