[Compatible]:String Trimmer Replacement Spool Compatible with Greenworks 2101602, 2101602A, STBA40B210, 2101602, ST40B410, BST4000 dual line string trimmers
[Compatible]:20ft 0.065 2900719 Replacement Spool line Compatible with Greenworks 24V and 40V Dual Line String Trimmers
[High Quality]:ABS spool & tough polyamide nylon line, flexible. Use centrifugal force and aerodynamics to reduce drag and achieve fast cutting
[Save Money and Time]:Aerodynamic shape allows less drag for more efficient cuts .With the auto feed system, the replacement spool eases the tedious work of hand-winding spools
[Warranty]: We will provide free 24-hour good after-sales service. When you encounter problems, please contact us first and we will help you as soon as possible.