ABS spool and nylon line: the line spool line for the edger was made of high quality raw materials, the ABS spool is strong enough, the nylon line is flexible, not easy to break, supports fast cutting and longer life. Compatibility: Suitable for Ryobi + SIDE RIMMER - 18V, 24V, 40V Coil for Ryobi + model part AC14RL3A. COMFORT AND HIGH EFFICIENCY: The aerodynamic shape allows the line to stretch and cushion on impact with hard surfaces, allowing less drag for more efficient cuts. Easy to use and install, pre-rolled, tool-free installation, snaps in and out of trimmer for easy use. Precautions when using: centrifugal force and rapid cutting when using, it is recommended to wear protective glasses and long pants to avoid unnecessary injuries. And this cordless weed killer refill is only suitable for soft grass. Weed blades are recommended. Size: cordless grass trimmer, 0.065 inch spool diameter, suitable for line hole. The 11-foot spool cord length provides a larger mowing area. ur: black + Material: ABS, Nylon Package Content: 6 x Replacement Spool The above package content, products are not included. The measurement allowed error is +/- 1-3 cm.