• ABS spool cover & durable nylon line, flexible. 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 • Easy to use and install: Remove cap cover. Automatic winding allows you to complete spool changes quickly, saving time and energy • Suitable for BOSCH strimmer trimmer ART 23 SL (3600HA5000), ART 23 SL (3600HA5070), ART 2300 (3600HA5002), ART 23-28 (3600HA5001), ART 26 SL (3600HA5100), ART 26 SL (3600HA5170), ART Easy Specifications: Spool Line: • Nylon cord: 1.6mm gray • Usage: 16FT/4.9M • Product size: 55*23.5mm Spool Cover: • Material: ABS • Product size: 33*75mm Note: Wear safety goggles and long pants when using this product to avoid injury from flying debris. This cordless weed eater spool refill is designed for light-duty use on young grasses. For thick or woody weeds, use appropriate tools such as blades. Package included: • 1 x Spool Line • 1 x Spool Cover • Other items not included