Compatible Models Flymo CONTOUR 500/500XT/700, POWER TRIM 500/500XT/700, MINI TRIM AUTO, SPEEDI-TRIM, MULTI TRIM 250D/250DX/300D/300DX, REVOLUTION 2000/2300/2500. 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 efficiency The spool line can be stretched and cushioned under the impact of a hard surface, and its aerodynamic shape allows more effective cutting and reducing resistance, making weeding more efficient. High quality The flexible and strong nylon spool is made of high-quality material, which can easily pass through grass and weeds. Excellent spool, not easy to break, supports fast cutting. Delivery Quantity: 4pcs Package Contents: Only the above package contents, excluding other products. Size: 5.6*5.6*2.4cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: as pictured (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)