What are the differences in lever materials ?

There are three common materials on the market: plastic, aluminum, and brass.

Plastic levers are inexpensive and lightweight, but they tend to become brittle over time in bathroom environments, eventually breaking.

Aluminum levers are also lightweight and easy to bend, making them adaptable to different toilet tank spaces. However, they are prone to deformation during transportation, which can affect sales.

Brass levers are the most durable and can also be bent to fit, though not as easily as aluminum. Their only downside is the relatively higher cost.