Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. This spool fits models 29252 and 29092, and 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. Each spool is pre-wound with 16 feet of 0.065 inch weedeater line for electric string trimmers. Constructed with high-quality ABS spool and durable nylon cutting line, designed for long-lasting performance. Suitable 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 enable fast, efficient cutting. Designed for trimming young grass; not intended for thick or woody weeds. For safety, always wear eye protection and long pants when operating. Disconnect power before installing or replacing spool. Package includes: 8 x replacement spools, 2 x spool cap covers. Materials: ABS, nylon. Colors: black, blue, green. Note: Lighting and display settings may cause slight color variations. Measurement tolerance is +/- 1-3 cm.