Description: Compatibility: The replacement spool line is compatible with for Bosch lawn mower ART 23 SL 26 SL, and the replaced wire for axis cover is compatible with F016F04557. It is an ideal replacement for F016800569 and F016800385 models, reducing the tedious work of manually winding the wire for axis and saving time and energy Durable materials: The grass scraper thread is made of durable ABS and high-quality nylon thread, which keeps the reel stable, wear-resistant, and faster when using the lawn mower Easy to install: No additional tools required, simply remove the old spool and replace it with a new one to complete the installation, maintaining the high performance of the lawn mower Fast Cutting: Is allowing the line to stretch and cushion on impact with hard surfaces.Use centrifugal force and aerodynamics to reduce drag and achieve fast cutting Package Content：6 Pcs Strimmer Wire Replacement Spool and 2 pcs replacement spool cover.please wear goggles and long pants when using this product for your safety,please unplug before changing,installing or removing accessories.For thick weeds, please use a for for razor blade to trim Specification: Color: As Shown. Material: ABS. ApplicableBrand: for BOSCH. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: Wire Replacement Spool*6 replacement spool cover*2