2.5 metersstraight line---the length of the spring is about 25CM ---- it can stretch about 1.25 meters5.0 metersstraight line--- the length of the spring is about 50CM ---- it can stretch about 2.5 meters7.5 metersStraight line---the length of the spring is about 75CM ---- can stretch about 3.75 metersType: 24AWG(0.2 square millimeters)quantity: 1pc