Usage Tips:Replacement spool 29252 Trimmer Replacement Spool Compatible with for Greenworks 24V, 40V, 80V Cordless String Trimmer. Replacement spool model 29252 and 29092 for greenworks, replacement cap covers model: 3411546A-6. 065 Single Line Auto Feed Spool Compatible with for Greenworks string trimmer / edger / models: 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, ST40L00. This Replacement Spool for Greenworks refills 16ft 0.065 inches weedeater line for Electric String Trimmers. ABS spool and Durable nylon string trimmer line,grass trimmer edger line,sturdy enough,strong enough for long working life. Replacement spool Compatible with for Greenworks Single Line 24V and G-MAX 40V String Trimmers. Auto feed spool for Greenworks use centrifugal force and aerodynamics to reduce drag and achieve fast cutting. Note: Always wear eye protection and long pants when using this product to avoid injury. Unplug tool changing, installing, or removing accessories. This cordless parts refill is only suitable for young grasses. Strong weeds use other tools such as blades to trim. Material:ABS, nylon colour:black+blue+green Package Contents: 8 x Trimmer replacement spool 2 x Replacement spool cap cover Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.