Compatibility: Compatible with Ryobi One+ AC14RL3A, suitable for multiple Ryobi cordless trimmer models: 18V, 24V, 40V. 【HIGH-QUALITY MATERIAL】: The replacement trimmer spool is made of high-quality ABS. Not easy to break, provides fast cutting and has a longer service life. 【Practical and efficient】: The trimmer line is soft and strong. Auto-feed replacement spool: Compatible with Ryobi trimmers and uses centrifugal force to feed the trimmer line as needed. 【Package Included】: 8 packs of replacement spools and 2 packs of replacement caps packed in one package. Spool diameter: φ56*25mm Straw rope: 3.3M*φ1.65mm Replacement spool. Material: ABS and polyamide nylon Available in three sizes Step 1 Stop the engine and brake the cover. Step 2: Put the spool back into the trimmer head. Step 3 Align the retainer with the ground outside the head. Step 4 Close the trimmer cover. Unplug the tool before changing, installing or removing accessories. There is a choking hazard, small parts should be