[Compatible models]:Compatible with Black & Decker String Trimmer Models:GE600,CST500, CST800, ST200, ST300, ST3000, ST1000,ST400, ST4000, ST4400, ST4500, ST5000, ST6500, ST6800. [Spool Specification]:Spool Model:RS-136/RS-136-BKP/143684-01. Spring model: 68223500,Cap model: 682378-02.Each spool is pre-wound 20 feet, 0.065'' diameter. [High quality products]:Spools by the CNC machine cutting and winding, automatic line change. High-quality ABS spool & durable polyamide nylon thread, flexible and long service life. Aerodynamic shape allows less drag for more efficient cuts. [Product set]:You can get 6*spools, 1*cover, and springs in this product set. You need to confirm your String Trimmer Models. If they are compatible with your device, You can place an order at any time. If you have any questions, please feel free to contact us for further assistance. Quality Assurance: If you have any quality problems, please feel free to contact us by email, we will solve the most perfect solution within 24 hours.

❤️[Compatible models]:Compatible with Black & Decker String Trimmer Models:GE600,CST500, CST800, ST200, ST300, ST3000, ST1000,ST400, ST4000, ST4400, ST4500, ST5000, ST6500, ST6800.

❤️[Spool Specification]:Spool Model:RS-136/RS-136-BKP/143684-01. Spring model: 68223500,Cap model: 682378-02.Each spool is pre-wound 20 feet, 0.065'' diameter.

❤️[High quality products]:Spools by the CNC machine cutting and winding, automatic line change. High-quality ABS spool & durable polyamide nylon thread, flexible and long service life. Aerodynamic shape allows less drag for more efficient cuts.

❤️[Product set]:You can get 6*spools, 1*cover, and springs in this product set. You need to confirm your String Trimmer Models. If they are compatible with your device, You can place an order at any time. If you have any questions, please feel free to contact us for further assistance.

❤️Quality Assurance: If you have any quality problems, please feel free to contact us by email, we will solve the most perfect solution within 24 hours.