Compatible Trimmer Model: Bosch Universal GrassCut 18, Universal GrassCut 18-26, Universal GrassCut 18-260 grass trimmer. Spool Model: F016800570. String Trimmer Replacement Spools 6m long, 1.6mm in diameter. Spool cover cap model: 1600A01R5J. Premium Material: Quality nylon cord, hard-wearing and efficient for cutting grass. Flexible and strong, allowing the line to stretch and cushion on impact with hard surfaces. Excellent Workmanship: Professional CNC cutting and automatic winding for consistent performance, reduces damage to the grass trimmer and prevents blockage during mowing. Precaution: When using this product, wear protective goggles and long clothing to avoid injury caused by flying debris. Remove the power source before replacing, installing, or removing accessories. Specification: Material: nylon. Size: 6 m long, 1.6 mm diameter. Trimmer Spool Model: F016800570. Trimmer Cover Cap Model: 1600A01R5J. Compatible with Bosch Trimmer Models: Bosch Universal GrassCut 18, Universal GrassCut 18-26, Universal GrassCut 18-260 grass trimmer. Features: Increases edging life up to 25% compared to normal use and conditions. Pliable and flexible, allowing the line to stretch and cushion on impact with hard surfaces. Aerodynamic shape allows less drag for more efficient cuts. Autofeed grass trimmer spool design helps reduce the need for hand-winding. Package Includes: Spools and cap as shown in picture.