Compatible Models Bosch ART 30-36 LI, ART 30, ART 27 and ART 24. Spools Product Number: F016800351. Autofeed System Replacement Spool The string trimmer replacement spool is compatible with the Bosch 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 ABS material, which can easily pass through grass and weeds. Excellent spool, not easy to break, supports fast cutting. Packing list 2 x F016800351 replacement trimmer spool. Spool specifications: Line length: 6 m/19.7 ft, diameter: 1.6 mm/0.063 inches.