In the unlikely event physical resistance is insufficient to stretch the cable, a lower useable length will be seen. 1.5m - 0.4 to 0.55m 3m - 0.5 to 0.75m 5m - 1.0 to 1.2m 7.5m - 1.3 to 1.5m. Weight1.5m - 2 kg, 3 m - 2.8 kg, 5m - 4 kg, 7.5m - 4 kg.