MaxPower's includes 1 package of commercial grade twisted trimmer line. This line measures 420 ft. in length and 0.065 inches in diameter for approximately 21 refills. MaxPower Twisted commercial grade trimmer line is designed to be the quietest, toughest, best-cutting and longest-lasting trimmer line on the market today. The Twisted line features includes less line drag, longer wear, significant improvement in energy efficiency, up to 50% noise reduction in the larger diameter lines, decreased equipment vibration and more impact power.