The FitBALL Club Tubing is a durable, easy-to-use resistance tube that is perfect for home or gym use. These 4ft long resistance tubes are a great way to tone and build muscle strength and can be used for a variety of exercises. Their lightweight, portable design allows you to take them to the gym, or stow them away in your luggage the next time you travel so you never miss a workout. Ball Dynamics features a complete line of FitBALL Tubing that is color-coded to indicate resistance level. The FitBALL Tubing is available in extra light, light, medium, and heavy resistance levels.