The Echo Original Equipment Speed-Feed® 500 Trimmer Head, model 99944200950B, is a high-quality head designed specifically for Echo trimmers. Made of durable black plastic, this head ensures efficient and precise trimming performance. Compatible with Echo trimmers, this product is ideal for maintaining your lawn or garden in top condition. Additionally, please be aware that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Always follow the safety precautions and guidelines provided.