The Master's 12 in. Package is the ultimate 12 in. package. This is the best 12 in. package that Iron Woody Fitness provides. This package includes the 12 in. #1 Mini, 12 in. #2 Super Mini, 12 in. #3 Small, 12 in. #4 Medium, and the 12 in. #5 Large bands. This package is great for stretching, strength training, hand, arm, leg, foot, ankle rehabilitation exercise. This package was specifically made for doctors and athletic trainers who needed a host of different bands to chose from.