Materials and Durability: Made from steel for enhanced durability and long lasting in demanding gardening tasks Resists wear and tear from frequent use Dimensions and Compatibility: dimensions of 6.7Cm diameter, 1.9cm height, and 0.7cm inner diameter ensures for FS120, FS200, and FS250 trimmers replacement part numbers 4134 160 2900 and 4128 160 2001 and Reliability: Engineered for consistent under heavy workloads Secure fit prevents slippage and ensures operations during extended use Application and Versatility: Ideal replacement part for trimmers Suitable for professional landscapers and DIYer enthusiasts maintaining lawns and gardens Functionality and Efficiency: Designed to optimize clutches operations, ensuring smoothly power transmission and efficiency in trimmer models Reduces vibrations for better handling, Manufacturer: Whoasyst