What material is the shock absorber plate of MN MODEL MN90 RC CAR made of?

High-strength alloy materials are often used to manufacture shock absorbers for remote control cars due to their good mechanical properties and corrosion resistance.
Composite materials, such as carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GFRP), may also be used to manufacture shock absorbers.
Rubber materials may also be used to manufacture shock absorbers or as part of shock absorbers.