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. Premium Material: Quality nylon cord, hard-wearing and cutting grass faster. Flexible and strong, allowing for the line to stretch and cushion on impact with hard surfaces. Excellent Workmanship: Professional CNC cutting and automatic winding is safer and more time-saving than manual winding, reduces damage to the grass trimmer and does not block when mowing. Precaution: When using this product, wear protective goggles and long underwear to avoid injury caused by overflowing the wires. Remove the plug from the socket before replacing, installing or removing accessories. Specification: Material: nylon Size: 6 m long, 1.6 mm diameter Trimmer Spool Model: F016800570 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 & conditions. Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces. Aerodynamic shape allows less drag for more efficient cuts. Autofeed grass trimmer spool, ease the tedious work of hand-winding spools. Package Includes: Spools (as picture show) Specification: Material: nylon Size: 6 m long, 1.6 mm diameter Trimmer Spool Model: F016800570 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 & conditions. Pliable and flexible allowing for the line to stretch and cushion on impact with hard surfaces. Aerodynamic shape allows less drag for more efficient cuts. Autofeed grass trimmer spool, ease the tedious work of hand-winding spools. Package Includes: Spools (as picture show)