Description: 【Material】: This EY20 gasoline engine part is made of metal, ensuring durability and long term performance. 【Product Size】: The size of the speed control spring is 55mm, making it a perfect fit for your EY20 gasoline engine. 【Package Contents】: The package includes 3 pieces - 1 rod, 1 thick spring, and 1 thin spring. 【Compatibility】: This carburetor spring is specifically designed for the EY20 gasoline engine, providing an exact fit and seamless functionality. 【Easy Installation】: With its precise design and size, this throttle return spring kits can be easily installed in your EY20 gasoline engine without any professional help required.   Size Chart: 5.5cm/2.17inch Package Includes: 1 Set Speed Control Springs(5 Pack) Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.