Compatible Models: Fits Ryobi One+ series cordless trimmer models. Spool model: RAC143. Compatible with RLT36B33 & RY36LT33A-0.CONVENIENT: Tool-less installation, insert and remove trim device, easy to use. Use centrifugal force and aerodynamics to reduce drag for fast cutting. DURABLR MATERIAL: High quality ABS spool and durable polyamide nylon cord for flexibility and long life. Ease of Operation: The automatic feeding system for changing spools helps relieve the tedious work of manually winding spools. Precautions for use: Please wear safety goggles and long pants when using this product to avoid injury to spilled lines. This cordless weeder parts refill is for young grass only. Strong weeds are trimmed with other tools such as blades. Color: Black + Fluorescent Green Material: ABS, Nylon Package Contents: 10 x Thread Trimmer Spool Only the above package contents, other products are not included. Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. Measurement tolerance is +/- 1-3 cm.