These latex rubber pull-up assistance bands are available individually or as a set. Each band has a 4.5mm thickness, a lay flat length of 41 inches, the width of the band will vary on the color of the band. Below are the width of each color band, along with the approximate resistance level.
Orange band has a 0.25-inch width and offers 5-15lbs of resistance
Red band has a 0.5-inch width and offers 15-35lbs of resistance
Black band has a 0.8125-inch width and offers 20-70lbs of resistance
Purple band has a 1.25-inch width and offers a 35-85lbs of resistance
Green band has a 1.75-inch width and offers 50-125lbs of resistance
Blue band has a 2.5-inch width and offers 65-175lbs of resistance