Replacing part numbers: 4149-141-9001, 41491419001, 4149 141 9001, which is a direct replacement for the old or broken one. Compatible with Stihl FS94, HL91, HL94, KM94 trimmers. Lawn mower spark arrestor screen with overall size 53 × 18 mm. Made of high metal material with excellent heat resistance and corrosion resistance, the sturdy structure ensures long-term durability and reliable performance under high-temperature working conditions. Spark arrestor filter effectively blocks carbon particles and debris from the exhaust system, helping maintain smooth airflow and reducing the risk of clogging for improved engine performance., Manufacturer: EMSea