This high-quality primer bulb is specially designed for STIHL BG45 BG46 BG55 BG56 BG65 BG66 BG75 BG85 BG86 BR45 BT45 models. It is perfect for those who need to replace the primer bulb of their STIHL string trimmer. The bulb is compatible with the aforementioned models and is made by a trusted brand. It is easy to install and will ensure that your string trimmer runs smoothly.