Pullum Athletic Resistance Band SetWe offer our resistance bands in seven different pound resistances depending on thickness and width. The greater the stretching distance of the band while exercising, the greater the resistance load of the band. All resistance bands are 41 inches long seamless latex rubber constructed in layers to prevent breakage. Pullum bands have a 1 year warranty from the date of purchase. We will cover any manufacturing defect as long as they haven't been misused