Weed Eater String Compatible With Greenworks, 6 Trimmer Spool, 1 Replacement Cap Suitable for Multiple GREENWORKS String Trimmer: 21362, 21602, 21062, 21132, 21242, 21282, 21302, 21332, 21262, 21312, 21342, 2100302, 2100202, 2100702, STBA40B210, ST40B410, BST4000, ST40L00 Automatic feeding system to change spools eliminates the time-consuming task of manually winding the trimmer spool High Quality: High-quality ABS spools and durable polyamide nylon threads are flexible and have a long service life. Utilizes centrifugal force and aerodynamics to reduce drag for fast cutting Each 29252 weed eater string is pre-wound with a 16-foot, 0.065-inch diameter, high-strength, durable nylon thread. Weed eater string for GREENWORKS original eater string models 29092/29252 and cap covers models 3411546A-6 Satisfactory Service: If you have any quality problems about our trimmer replacement spool, please feel free to contact us and we will reply you asap 29252/29092 Replacement Trimmer Spool: 2.15in * 0.91in; 3411546A-6 Spool Cap Cover: 2.93in * 1.38in