"The Men’s SuperSpeed Golf Training System is the perfect way to add up to 30 more yards to your drive! Coupled with our complimentary online video instruction series, this system will help you increase the speed and power of your golf swing by 5% to 8% in as little as 4-6 weeks of regular practice. Get ready to bomb the ball off the tee and leave your competitors in the dust!スペックItemLengthOverall WeightGreen “Light” Club45″255gBlue “Medium” Club45″290gRed “Heavy” Club45″335g"