BLUE MEDIUM STRENGTH SELECTED --- Our Medium Strength Blue band (6-9 lbs. tension) offers a good tension workout for physically active people needing a challenge.DO IT YOURSELF LATEX FREE BANDS --- Each bulk roll is 25 ft. (8 yards) long by 6 inches wide. Professional grade TPE, powder free, scent free and latex free.30 PAGE RESISTANCE BAND E-BOOK INCLUDED