- Compatibility: Designed for use with C1M-S237, FS40, FS50, FS50C, and FS56 string trimmers. For a complete list of compatible models and years, please refer to the detailed product description. - Cleaner Operation: This lawn mower air filter effectively blocks dust, grass particles, and debris from entering the engine. By keeping the internal system clean, it enhances performance, particularly in dry or dusty conditions. - Consistent Airflow: As a reliable garden engine air filter, it ensures balanced air intake for efficient fuel combustion. This promotes steady engine power and optimal performance throughout your mowing tasks. - Enhanced Engine Longevity: The air intake filter minimizes the accumulation of harmful particles that can damage engine components over time. It supports long-term reliability by maintaining cleaner airflow and reducing internal friction. - Practical Applications: Ideal for residential lawn maintenance, landscaping tasks, and professional mowing services. This filter is essential for anyone looking to extend the life of their trimmer while improving performance in challenging outdoor conditions. - Material and Function: Constructed for durability, this filter is designed to withstand rigorous use while effectively performing its function of air filtration. Ensure your trimmer operates at peak efficiency with this essential air filter, designed specifically for select models to improve performance and extend engine life.