Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. This spool fits models 29252 and 29092, and replacement cap covers model 3411546A-6. Features 0.065 inch single line auto feed design compatible with Greenworks string trimmer, edger, and weed eater models: 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, ST40L00. Spool refills with 16ft of 0.065 inch weedeater line for electric string trimmers. Constructed with high-quality ABS spool and durable nylon trimming line, designed for strength and long-lasting performance. Compatible with Greenworks single line 24V and G-MAX 40V string trimmers. Auto feed mechanism uses centrifugal force and aerodynamics to reduce drag and enable efficient cutting. Always wear eye protection and long pants when operating. Disconnect power before installing, removing, or changing accessories. This refill is intended for use on young grass only. For thick weeds, use alternative tools such as blades. Material: ABS, nylon. Color: black, blue, green. Package includes: 8 x trimmer replacement spools, 2 x replacement spool cap covers. Product does not include any other items not listed. Note: Lighting and display settings may cause slight color variations between image and actual item. Measurement may vary by +/- 1-3cm.