This is a replacement spool and line for Einhell grass trimmers, specifically compatible with the GE-CT 18/28 Li and GE-CT 18/28 Li TC models. The durable nylon thread is 5 meters long and has a diameter of 1.6 mm. The spool features an automatic tap system for continuous thread feeding, ensuring an optimal cutting width of up to 28 cm. It's an ideal accessory or spare part to easily replace used or torn trimmer line.