Pre-wound: The spool line is 4 meters long and 1.6 mm in diameter and factory-wound for maximum reliability and uncompromising performance. Compatible with Bosch EasyGrassCut 23, 26, 18, 18-230, 18-260, 18-26. Highest quality: Our spool is made of durable ABS material and polyamide nylon thread. Flexible, pliable and long-lasting. Easy to use: Snap-in installation for quick and easy replacement without tools. Professional CNC machine cutting and automatic spool winding is safer and less time-consuming than manual spool winding, reducing damage to the grass trimmer and eliminating problems during cutting. Warm tip: Strong centrifugal force and fast cutting during use. Wear eye protection and long pants to avoid unnecessary injuries. Material: ABS, nylon Color: Black Package contents: 6 x Spool & Wire 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 +/- 1-3 cm.