The Stihl 47125290200 Insulation Ring is a genuine OEM replacement part designed for specific Stihl cut-off saw models, including the TS 400. This critical component helps to insulate the carburetor from engine heat, maintaining optimal fuel mixture and preventing vapor lock, which is essential for consistent engine performance and longevity. Manufactured to Stihl's rigorous standards, this insulation ring ensures a precise fit and reliable operation, restoring your equipment to its original specifications. Always use genuine Stihl parts for guaranteed compatibility and performance.