Usage Tips:ABS spool cover amp 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 Free a cap cover. Automatic winding allows you to complete spool changes quickly, saves you 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 SL3600HA5100, ART 26 SL 000000.. HA5170, ART Easy Specifications Spool Line Nylon cord 1.6mm gray indentation Usage 16FT4.9M Product size 5523.5mm Spool Cover Material ABS Product size 3375mm Note Wear safety goggles and long pants when using this product to avoid injury from spilling lines. This cordless weed eater parts refill is only suitable for young grasses. Strong weeds use other tools such as blades to trim.