Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. Fits models 29252, 29092, and cap cover model 3411546A-6. 065 inch single line auto feed spool designed for Greenworks string trimmers and edgers including models 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, and ST40L00. Spool refills 16 feet of 0.065 inch weedeater line for electric string trimmers. Made with high-quality ABS and durable nylon string for reliable performance. Designed for use with Greenworks single line 24V and G-MAX 40V string trimmers. Auto feed mechanism uses centrifugal force and aerodynamics to reduce drag and enhance cutting speed. Always wear eye protection and long pants when operating equipment. Disconnect power before installing, removing, or changing accessories. This replacement spool is intended for trimming young grass; for thick weeds, use alternative tools such as blades. Material: ABS, nylon. Color: black, blue, green. Package includes: 8 x replacement spools, 2 x spool cap covers. Product may vary slightly in color due to lighting and monitor settings. Measurement tolerance: +/- 1-3 cm.