Stihl 4004 710 4000 Cap Bar Length_15" The O-Ring 35x3-FPM 80 is

The O-Ring 35x3-FPM 80 is a high-quality sealing ring from Stihl

an easy-to-lock-off figure 8

Made from anodized aluminum

The heavy duty version of the 25kN Boa looks very similar

Stihl 4004 710 4000 Cap Bar Length_15" The O-Ring 35x3-FPM 80 isIntroducing the genuine Stihl cap for the AutoCut 10 2 and AutoCut 11 2 grass trimmer heads. This essential component is designed to securely hold the line spool in place while protecting the internal feed mechanism from damage. Crafted from durable, impact resistant polymer in the iconic Stihl orange, this circular cap easily twists or clips into position, ensuring a secure fit. Experience reliable performance during your daily strimming and edging