... 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 Introduction:Burglar alarm cable is specifically designed for intruder alarm systems but finds ... 22mm ,(4 core ,7/0.20 copper, 305m/roll)