Material: ABS Color: Blue Quantity: 8-piece set (6 Spool + 2 Cap), 10-piece set (8 Spool + 2 Cap) Package Content: 1 set of lawn mower accessories ABS Material - The edger replacement string spool line is made of premium quality raw material. The ABS spool is sturdy, and the nylon line is flexible and strong, designed for a long working life. Compatible with Ryobi One+ String Trimmer - 18V, 24V, 40V. The spool is compatible with Ryobi One+ original model part# AC14RL3A. The cap is compatible with 522994001, 3411546-7G, AC14HCA. Use Precautions - Strong centrifugal force and fast cutting action occur during use. It is recommended to wear eye protection and long pants to avoid injury. This cordless weed eater parts refill is suitable only for light weed grass. For stronger weeds, the use of blades is recommended. Save Working Time - Easy to use and install with pre-wound, tool-less installation. The spool quickly inserts and removes from the trimmer, providing convenience and long-lasting performance that saves time and effort. Automatic System - Easy to assemble and use. Compatible with the Ryobi line trimmer and uses centrifugal force to feed the trimmer line as needed. The auto-feed system and spare spool eliminate the need for hand-winding, making maintenance easier. The grass trimmer operates smoothly without clogging during mowing.