These replacement cords are easy to install and flexible to use, take advantage of centrifugal force and aerodynamics to reduce the tedious work of manual winding spools, allowing you to work more efficiently Pants to avoid unnecessary injury 5 Reliablematerial: High quality ABS spool and durable nylon thread, flexible and long service life Material: ABS, Nylon Color: Black Quantity shipped: 3 pieces Package Contents: Only the above package contents, excluding other products. Size: length, width and height of spool: 55mm*55mm*23.2mm, wire diameter: 1.6mm, Line length: 4m (Reminder: The size is measured by hand, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)