Abrasion Resistant: The AF100 trimmer spool is made of an improved nylon polyamide material that has a tensile strength of over 45kg and is 30 percent more durable than other brands for a longer lifespan.Easy to Install: The spool is the perfect size for the trimmer model, ready to use and can be installed in a timely manner without tools.Easy to use: The weed eater spool compatible with Black and Decker automatically feeds the trimmer using centrifugal force, reducing the hassle of manually sorting out the replacement trimmer line spool while working.Professional Seller: As a professional brand, we have an excellent after-sales service team and product quality guarantee.Package includes 12 packs AF100 thread spool 1.65mm 9m or pcs, 3 pieces cap, 3 pieces spring.Grass trimmer spool compatible with Black and Decker grass trimmer models: GL280, GL301, GL425, GL430, GL545, GL555, GLC13, GLC2500, GLC2500L, GLC3000, GL4525, GL4525SB, GL5028, GL5028SB,GLC1423L, GLC1825N, GLC1823L, GLC 1825L, GLC3630L, ST5530,ST4525, STC1820, STC1815, STC1820PC or EPC, STC1840 or EPC, ST1823.