From the brand Product Description 1. Compatible with: for Bosch F016800431 brush cutter line spools for bosch AFS 23-37. for Bosch F016800431 line for brush cutter AFS 23–37 2. High-quality materials: Strong trimmer lines for Bosch AFS 23-37 brush cutter, Made of high-quality materials, more durable. ABS spool and durable polyamide nylon wire, flexible and long service life. 3. Size: Diameter: 3.5 mm. Length: 37 cm. strong trimmer lines for AFS 23-37 brush cutter. 4. Easy to use, easy to install: simply remove the old line and replace it with a new line to complete the installation. Extra strong line for AFS 23-37 brush cutter - Brush cutter line F016800431 5. Contents: 10 pieces. each 37 cm long and 3.5 mm in diameter. Strong trimmer lines for AFS 23-37 brush cutter for Bosch F016800431.