Lifeline Flat Band Loops Kit-Levels 1, 2, 3 One Size Flat Band Loops help build muscle stamina and strength, improve balance, expand range of motion and increase coordination Kit Includes Three (3) progressive color-coded resistance levels -Light (Red), Medium (Black) and Heavy (Gray) Use in exercises that work in multiple planes of motion, especially lateral and rear exercises that target hips, hamstrings and glutes. Safely rehab or prevent injuries by increasing muscle stamina and strength Size: 9.5 inch Diameter Loops