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-6.065. 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 trimming line, suitable for grass trimming and edging. Designed for long working life. 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. Always wear eye protection and long pants when using this product to avoid injury. Unplug the tool before changing, installing, or removing accessories. This refill is intended for use on young grasses only. For tough 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. Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.