Floor pressure-pad security switch manufactured from Seem welded black PVC. A black PVC-covered 16/0.2 mm lead-out wires, 300 mm long. Two wires comprise the N/O SPST circuit, whilst two others form a continuous loop. The switch circuit pair has 5 mm pre-stripped ends. The small pressure pad is recommended for use under the stair carpet (RS 918-4756 ) and the large type is suitable for use under carpets adjacent to doors and windows.