General description The 10 Pack Trimmer Line Spool is designed for compatibility with various Black and Decker trimmers, providing an efficient and hassle-free cutting experience. This replacement spool features an automatic feed mechanism that utilizes centrifugal force, minimizing the need for manual adjustments while you work. Technical specifications Trimmer line diameter: 1.65 mm Material: Upgraded polyamide nylon Tensile strength: Over 100 lbs Durability: 30% more durable than other brands Compatibility and accessories Compatible with Black and Decker models: GL110, GL320, GL325, GL300, GL200, GL220, GL225S, GL420, GL280, GL301, GL425, GL430, GL545, GL555, GLC2500L, GLC3000, GL4525, GLC1423L, GLC1825N, GLC1825L, GLC3630L, GLC1823L, ST1820, STC1820CM, SSTC51820PC/EP, STC1840 Package includes: 8 replacement spools, 2 spool caps, 2 springs Usage Pliable and flexible trimmer line enhances cutting efficiency by 50% Stretches and cushions impact with hard surfaces for improved