Compatible models: For Greenworks 20v, 24v, 40v, 80v string trimmer models: 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, ST40L00. Spool model: 29252, Cap cover model: 3411546A-6.High : High- ABS spool and Durable nylon string trimmer , grass trimmer edger , pliable and flexible and long service life.Size: Cordless grass trimmer spool diameter 0.065 inch to fits hole perfectly. Spool length 16ft a wider range of mowing.Easy to use and install: Snap into place for quick and effortless replace without tools. Auto feed spool for Greenworks use centrifugal force and aerodynamics to reduce drag and achieve fast cutting. -wound spool saves you time and energy.Precautions for use: Wear safety goggles and long pants when using this product to avoid injury from spilling lines. This cordless parts refill is only suitable for young grasses. Strong weeds use other tools such as blades to .Colour: Black+Blue+GreenMaterial: ABS, NylonPackage Contents:6 * String Trimmer Spool 2 * Cap CoverOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.