Replacement spool 29252 compatible with Greenworks 24V, 40V, and 80V cordless string trimmers. This spool fits models 29252 and 29092, and is also compatible with weed eater cap covers model 3411546A-6.065. Single line auto feed spool designed for use 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. Made with high-quality ABS spool and durable nylon trimmer line, suitable for grass trimming and edging tasks. 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 operating this product to avoid injury. Disconnect power before installing, removing, or changing accessories. This replacement spool is intended for use on young grass only. For thick or woody weeds, use appropriate cutting tools such as blades. Material: ABS, nylon Color: Black, blue, green Package contents: 8 x Trimmer replacement spools, 2 x Replacement spool cap covers Product includes only the items listed above; other accessories are not included. Note: Lighting and display settings may cause slight color variations between the product image and actual item. Measurement may vary by +/- 1-3cm.