Compatibility: Compatible with ECHO GT-225, SRM-225, and PAS-225 trimmers, ensuring a perfect fit and optimal performance. Size for Efficiency: Each filter measures 67.6x66mm, providing maximum surface area for effective filtration. This precise sizing prevents dirt and debris from entering your engine, enhancing performance and extending the lifespan of your trimmer. Material: Made from rubber and filter cotton, these air filters offer durability and effective filtration. Bulk Pack for Convenience: This package includes 5 pieces of trimmer air filters, ensuring you have ample replacements on hand. Easy Installation: Designed for hassle-free replacement, these filters can be installed quickly without special tools. Keep your trimmer in top condition effortlessly, allowing you to focus on the job rather than maintenance., Manufacturer: OTOTEC