Feature 1Perfect Fit: Compatible for RYOBI automatic feed trimmers and replacement for RYOBI original spool. 2Time Saving: The pre loaded spools come ready to use, eliminating the need for manual winding and saving your valuable time. 3Nylon Material: Each spool is pre wound with durable and high strength nylon thread, providing long lasting performance. 4Efficient Cutting: Flexible trimmer spool allows line to stretch and cushion on hard surfaces, increasing cutting efficiency by 50 percent for more effective weed trimming. 5Package: Get 8 replacement spools, 2 covers, enough for replacing your original parts, making it easy on repairs and maintenance.Item Type: StringTrimmerSpoolMaterial: NylonWeight: Approx. 245g / 8.6ozSpool Size: Approx. 56x24mm / 2.2x0.9inCover Size: Approx. 76x34mm / 3.0x1.3in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List8 x Spool2 x Cover