Resistance training is a unique and dynamic way to tone and strengthen muscles or improve cardiovascular fitness. These versatile rubber tubes can be used for a variety of exercise and strength training routines. The Group Resistance Tubing from Ball Dynamics is ideal for fitness centers or gyms. These 4ft tubes feature plastic handles that are easy to clean. The handles feature a grommet connection that offers a wider range of motion. The Group Resistance Tubing is color-coded for resistance level and is available in extra light, light, medium, heavy, and extra heavy resistance levels.