A. This is an activated carbon canister connecting tube specially designed for cars. It is carefully designed to be compatible with a variety of vehicle models, including some common classic models. B. In terms of design, this connecting tube has an exquisite structure. Its unique design ensures a tight connection with the car's activated carbon canister, effectively preventing problems such as air leakage and providing strong support for the stable operation of the car. C. In terms of function, it is an important and indispensable part of the car's activated carbon canister system. The activated carbon canister system plays a key role in controlling the evaporation and emission of automobile fuel. D. This connecting tube acts like a "bridge", ensuring a smooth connection between the activated carbon canister and related components. In this way, the fuel vapor can flow and be processed normally, thereby improving the fuel efficiency of the car, reducing the impact of exhaust emissions on the environment, and also helping to maintain the good performance of the car engine.