Compatible ModelsCompatible with Flymo Contour, Contour XT, Contour 500 XT, Contour 500E, Contour 700, Power Trim(PNC 9648641), Power Trim 500 XT, Power Trim 500/700 (PNC 9648596/7), Mini Trim, Mini Trim Auto ST/XT, Mini Trim Plus XT, Mini Trim Contour XT,Auto XT, Auto Mini Trim, Auto Plus, Speedi-Trim, Multi Trim 250D, Multi Trim 250DX, Multi Trim 300D, Multi Trim 300DX, Revolution 2000, Revolution 2300, Revolution 2500,Twist 'n' Edge. Autofeed System Replacement Spool The string trimmer replacement spool is compatible with the Flymo lawn mower, and can use centrifugal force to transport the trimming thread as needed, effectively reducing the tedious work of manually winding the spool. High QualityThe flexible and strong nylon spool is made of high-quality ABS material, which can easily pass through grass and weeds. Excellent spool, not easy to break, supports fast cutting. The spool stretches and cushions under impact from hard surfaces, and its aerodynamic shape allows for more efficient cutting and reduces drag for more efficient weeding. Spools Product NumberFLY021, 513937190.Please confirm whether the spool matches your strimmer model before purchasing. Packing list 4 x FLY021/513937190 replacement trimmer spool. Spool specifications: Line length: 11 m/36 ft, diameter: 1.5 mm/0.06 inches.