[Compatible Models]: Bosch UniversalGrassCut 18, UniversalGrassCut 18-26, UniversalGrassCut 18-260. Replacement Spool for Automatic Line Feed System: The replacement spool for the irrigation brush cutter is compatible with Bosch brush cutters and uses centrifugal force to feed the brush cutter line as needed, effectively reducing the tedious task of manual winding. 【Efficient】: The spool expands and absorbs the impact of hard surfaces. Its aerodynamic shape enables more efficient cutting and less resistance for better weeding. High Quality: The flexible and durable nylon spool is made of high-quality PA material that cuts grass and weeds with ease. Excellent spool, does not break easily and ensures fast cutting. Specifications: Nylon rope size: 1.65 mm - black spiral spool. Capacity: 20 ft/6.1 m. Product weight: Spool: 40 g, Cap: 26 g. List: Fits GrassCut 18-26 Universal Cutting Head F016800570, Lawn Mower Cap, Mounting Spool Accessory* (4 spools + 1 cap).