Compatible with: Compatible with for Afs 23-37 Grass Trimmers. Replace Part Number: Trimmer Line Model: F016800431 Premium Material: The product is , sturdy, not easy to break, trimmer line is made of premium nylon line, hard-wearing and long service life. High Efficiency: Aerodynamic shape allows less drag for more efficient cuts Size: The trimmer line is 3.5mm / 0.138 inch in diameter, 37cm/14.57 inch in length Material: Nylon Color: as shown Package Contents: 10 x straw rope Only the above package content, other products are not included. Note: Light reflection 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.