For optimum performance, Autoclip robot lawn mowers must be installed following the proper procedure. This kit contains 300 metres of cable, 500 nails and 6 connectors. The cable releases a strong signal at all points of activity on the perimeter, even those furthest from the charging station, and is made of laminated copper. It has an external diameter of 3 mm and internal diameter of 1.5 mm. The cable is secured with nails and connectors. This kit can be used with all STIGA Autoclip robot lawn mowers.