Pre-Wound: The spool line is 13.2ft in length and 0.063 inch in diameter and factory wound for maximum reliability and uncompromised performance. Compatible with for Bosch EasyGrassCut 23, 26, 18, 18-230, 18-260, 18-26. Premium Quality: Our spool replacement is made of durable ABS material and polyamide nylon thread. Pliable, flexible and long-lasting. Easy to Use: Snap-in installation for quick and easy replacement without tools. Professional CNC machine cutting and automatic bobbin winding is safer and less time consuming than manual bobbin winding, reducing damage to the grass trimmer and eliminating snags when mowing. Warm Tip: Strong centrifugal force and fast cutting during use. Please wear eye protection and long trousers to avoid unnecessary injury. Material:ABS, nylon colour:Black Package Contents: 6 x Spool & Line Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.