Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. Fits models 29252, 29092, and cap cover model 3411546A-6. 0.065-inch single line auto feed spool compatible with Greenworks string trimmer and edger models: 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, ST40L00. Refills 16 feet of 0.065-inch weedeater line for electric string trimmers. High-quality ABS spool and durable nylon trimmer line designed for long-lasting performance. Suitable for grass trimming and edging tasks. Compatible with Greenworks single line 24V and G-MAX 40V string trimmers. Auto feed mechanism uses centrifugal force and aerodynamics for smooth line release and efficient cutting. Safety note: Always wear eye protection and long pants when operating. Disconnect power before installing or removing accessories. This refill is intended for light-duty use on young grass; for thick weeds, use a blade or appropriate cutting tool. Material: ABS, nylon Color: black, blue, green Package includes: 8 x Trimmer replacement spools 2 x Replacement spool cap covers Note: Colors may vary slightly due to lighting and screen settings. Measurement tolerance: ±1-3 cm.