Alcoa has developed an aluminum alloy Dura-Bright fuel tank, landing gear, and composite plates. The aluminum alloy Dura-Bright fuel tank is resistant to corrosion and does not require polishing on the surface, which can make the surface gloss last for many years. The new aluminum alloy landing gear can reduce the weight of a truck's trailer by 100 pounds, and can meet or exceed all load conditions. This aluminum alloy landing gear, also known as the fifth wheel, uses Holland's own "lubrication-free" technology. Made of 6061 T6 wrought aluminum plate, it reduces the weight by 100 pounds compared with the representative steel processed fifth wheel.