Products: Replacement ART 23SL 26SL Series Mowing Rope, F016800569 Mower Spool Cover High quality ABS spool and durable polyamide nylon thread for flexibility and long life. Use centrifugal force and aerodynamics to reduce drag and enable fast cuts. Replacing spools with an automatic feeding system reduces the tedious work of manually winding spools. Reminder: Strong centrifugal force and fast cutting speed during use. Please wear goggles and long pants to avoid unnecessary injury. Material: ABS, Nylon Color: Black Package Contents: The 4 x spools are the above package contents only and do not include other products. Note: Light shots and different monitors may cause the color of the item to be slightly different from the actual item in the picture. Measurement tolerance is +/- 1-3 cm.