What material is the filament in the throttle?

Aluminum. Throttle is a controllable valve that controls air to enter the engine. The product material description shows that it is made of aluminum. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion is successful. It connects the air filter and the engine block, and is called the throat of the automobile engine. Throttle is one of the most important components in EFI automobile engine system.