The STIHL AutoCut 5-2 String Trimmer Head with Line 4006-710-2100 is a genuine OEM product designed specifically for STIHL trimmers. It is compatible with models such as the Stihl FS36  38 40 45 50 and Stihl FS 40C, featuring a 2-stroke engine type and a power output of 2100 W. Made of durable black plastic, this trimmer head comes ready to use without the need for assembly. Manufactured in the United States, this product ensures quality and reliable performance for your yard, garden, and outdoor living needs.