Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. This replacement spool fits models 29252 and 29092 for Greenworks, and cap covers model 3411546A-6.065. Single line auto feed spool 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. Refills 16 ft of 0.065 inch weedeater line for electric string trimmers. High-quality ABS spool with durable nylon trimmer line, suitable for grass trimming and edging. Designed for long working life and strong 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 fast cutting. Note: Always wear eye protection and long pants when using this product to avoid injury. Unplug the device before changing, installing, or removing accessories. This replacement spool is intended for use on young grass only. For thick weeds, use appropriate tools such as blades. Material: ABS, nylon Color: Black, blue, green Package Contents: 8 x Trimmer replacement spools, 2 x Replacement spool cap covers Only the listed items are included. Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement may vary by +/- 1-3 cm.