NuActiv Pull Up Assist Resistance Bands. Great for Stretching & Mobility, Pull Ups, Chin Ups, Muscle Ups, Ring Dips, Physical Therapy, Home Gyms, Powerlifting, Bench and much more! THIS IS OUR #1 RED BAND: This band measures 13mm (1/2 in) wide, 4.5 mm thick and 41 inches long Many people buy more than one band and combine the bands for most efficient training. Combining bands gives you many levels of assistance for pull ups, dips at a dip station or ring dips with gymnastics rings. Using multiple bands will also give you many levels of resistance for weight training to substitute for switching between different weighted dumbbells. In addition to using these bands for assisted pull ups, dips and strength training, they are also helpful with physical therapy, mobility and flexibility exercises for both upper and lower body. Sale is for a SINGLE BAND. Choose one of our five different resistance levels. Read the bullet below for the description of the band you are currently choosing.