Usage Tips:Spool Cap Specification: with for Greenworks spools, 16ft 0.065 inches, with spools models 29252 and cap covers models 3411546A-6. Models: with for Greenworks string trimmer cap: 21332, 21222A, 21602, 21062, 21132, 21242, 21282, 21312, 21302, 21342, 21362, 21262, 2100202, 2100302, 2100702, STBA40B210, ST40B410, BST4000, ST40L00.3411546A-6 spool cap, grass trimmer spool cap cover for Greenworks made of ABS, durable for .3411546A-6 replacement spool cap for Greenworks protects trimmer line fixed spool, prevent weeds from getting stuck inside, avoid damage to the trimmer.Easy to install, no needed to install, simply unhook the old cap and this can be snapped in place over spool line, to go in seconds.Material:ABScolour:GreenPackage Contents:2 x Cap CoverOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.