Pre-Wound: The spool line is 13.2 ft in length and 0.063 inch in diameter, factory wound for maximum reliability and consistent performance. Compatible with Bosch EasyGrassCut 23, 26, 18, 18-230, 18-260, and 18-26 models. Premium Quality: Spool replacement made from durable ABS material and polyamide nylon thread. Flexible, pliable, and long-lasting. Easy to Use: Snap-in installation allows for quick and tool-free replacement. Precision CNC cutting and automatic bobbin winding ensure safer, more efficient operation compared to manual winding, helping reduce trimmer wear and prevent line snags during use. Warm Tip: Due to strong centrifugal force and fast cutting action during operation, it is recommended to wear eye protection and long pants to help prevent injury. Material: ABS, nylon. Color: Black. Package Contents: 6 x Spool & Line. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.