Package Includes: 4 Pieces 4.5cm Governor Springs, 4 Pieces 7cm Governor Springs, 2 Pieces Spark Plug, 2 Pieces Primer Bulb, 2 Pieces Fuel Filter Foam air, 2 Pieces carburetor diaphragm gasket. Spark plug: The spark plug is made of ceramic and metal, strong and durable, can be used for a long time, high temperature resistant, long service life and good reliability. Governor spring: The governor spring is made of metal, which has high strength and excellent elasticity, is strong and wear-resistant. The spring can reduce the noise caused by long-term use of the lawn mower. lawn, reduce the engine's energy consumption and extend the machine's service life. Carburetor Diaphragm Gasket: This carburetor repair kit is made of premium plastic material. The carburetor diaphragm gasket is easy to install and has simple operation. A direct replacement for the old or broken one, allowing you to easily perform carburetor maintenance. Wide Applications: Compatible with Briggs & Stratton 4216 5086K