Fitment:for 139/140/GX35 Smooth and Precise Throttle Control: This lawn mower throttle handle switch allows for easy and accurate control of your mower’s engine speed. It enables smooth acceleration and deceleration, ensuring efficient operation and optimal mowing performance Durable and Reliable: Built from high-quality materials, this mower throttle control switch is designed to resist wear and outdoor elements. It ensures long-lasting durability, providing consistent performance during long mowing sessions Easy to Install: Replacing or upgrading your lawn mower throttle handle is quick and simple with this easy-to-install switch. It fits seamlessly into your mower’s throttle system, restoring full functionality with minimal effort Enhanced Mowing Efficiency: With this gas lawn mower throttle switch, you’ll have better control over your mower’s speed, which improves fuel efficiency and reduces engine strain. This ensures more comfortable and effective mowing, even in challenging lawn conditions