Compatible with several Black Decker lawnmower models: GL110, GL320, GL325, GL300, GL200, GL220, GL225S, GL420, GL280 、 GL301 、 GL425 、 GL430 、 GL545 、 GL555 GLC2500L 、 GLC3000 、 GL4525 、 GLC1423L 、 GLC1825N 、 GLC1825L (20) 、 GLC3630L 、 GLC1823L (20) 、 ST1820 ， STC1820CM, SSTC51820PC / EP 、 STC1840 Auto Feed Spool : The replacement spool compatible with Black and Decker weed eater is easy to use, automatically feeds the trimmer by centrifugal force, reducing the chore of manually sorting the replacement spool while working. Abrasion Resistant: The trimmer line compatible with BLACK+DECKER weed eater is constructed with an upgraded polyamide nylon material that has a tensile strength of over 100 lbs and is 30% more durable than other brands for a longer service life. Efficient Cutting: The Trimmer spool line compatible with Black & Decker is pliable and flexible, allowing the line to stretch and cushion the impact with hard surfaces, and increases cutting efficiency by 50%, allowing