Spool: •High-Quality Material: The wire adopts high-quality nylon material,anti-tear and durable to use •Long-Lasting: Wear-resistant,reducing the need for frequent replacements •Optimal Trimming: Ideal for mowing lawns,ensuring precise and effective trimming results •Easy Installation: Convenient to replace,installs in just a few seconds Spool Cap: •High-Quality Plastic: Made of plastic material with high strength,good toughness,and excellent wear resistance •Effective Protection: Safeguards your spool and line,ensuring safe operation of your lawn trimmer •Easy Installation: Convenient to replace,installs quickly in just a few seconds Specifications: •Spool cap material: plastic •Spool cap size: 87.5*43mm •Nylon rope: 2.0mm emerald green round •Length: 20FT/6.1M •Spool size: 66*31mm Compatible with: •Black & Decker GH3000 •Black & Decker GH3000R •Black & Decker LST540 •Black & Decker LST540B Package included: •4 x Replacement Spool •1 x Spool Cap •Other things not included