Features: - The shell is made of high quality nylon, solid and durable. - Convenient to change, easy to install. Vibration is small, wear well and good abrasion performance. - It fits for Echo Speed-Feed 400, SRM-225, SRM-230, SRM-210. - This Head Is Strictly For Straight Shaft Model Trimmers, NOT for Curved Shaft Trimmer. - Practical and compact, a great accessory for brush cutter. .
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