SPEEDSTER Power Kicker- Explosive Leg and Arm Resistance. Heavy Resistance. Resistance Training For Soccer, Martial Arts, Football And All Other Sports 4ft Lightning Cord that stretches to 12ft Features Safety Sleeve Technology to protect tubing from damage and overstretching. Lightning Cords can last 10x's longer than uncovered tubes. Speedster Training Products are used by athletes, coaches, organizations and teams worldwide. Made in USA. 1 year conditional warranty.