Sun Joe SDJ616L 20-Pack Shredder Joe Leaf Mulcher/Shredder Replacement Line Made of durable nylon for tough cutting and maximum reliability To be used with the Sun Joe Shredder Joe SDJ616 electric leaf mulcher/shredder Contains 20 pieces per bag Line diameter is .1 "x 12" (.25 cm x 30.5cm) Pre-cut to perfect length for bladeless mulching and shredding