Abs Spool & Nylon Line: The edger replacement string spool line were made of premium quality raw material, ABS spool sturdy enough, nylon line string flexible, Not easy to break supports fast cutting and longer . Compatiblity: Suitable for + STRING TRIMMER - 18V, 24V, 40V. Spool for + model part# AC14RL3A. Convenience & High Efficiency: Allowing for to stretch and cushion on impact with hard surfaces, the aerodynamic shape allows less drag for more efficient cuts. easy to use and install pre-wound Tool-less installment, pops in and out of trimmer for ease of use. Use Precautions: Strong centrifugal force and cutting fast during using, recommend to wear eye protection and long pants to avoid unnecessary injury. And this cordless weed eater parts refill is only suitable for tender weed grass. Strong weeds been recommended to use blades to trim. Size: Cordless grass trimmer spool line diameter 0.065 inch to fits line hole perfectly. Spool line length 11ft provide a range of mowing. Colour:black+blue Material:ABS, nylon Package Contents: 12 x Replacement Spool 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.