Group Exercise Resistance Tubing. Help improve your core strength, flexibility, and balance, with FitBALL"s complete line of professional-quality burst-resistant balls and premium ball accessories, books and videos. Our professional-quality tubing is our best value for group exercise classes, clinics or gyms. The basic design includes a 4" long rubber tube attached to easy-clean plastic handles. Grommet connection within handle webbing offers full range-of-motion rotation. Five color-coded resistance levels accommodate a wide range of users (sold individually). Dimensions: Black Tube (Extra Heavy) - 7" L x 71" H, Weight: 0.5 lbs. Blue Tube (Heavy) - 7" L x 71" H, Weight: 0.4 lbs. Red Tube (Medium) - 7" L x 71" H, Weight: 0.35 lbs. Green Tube (Light) - 7" L x 71" H, Weight: 0.3 lbs. Yellow Tube (Extra Light) - 7" L x 71" H, Weight: 0.2 lbs.