When it comes to chemical resistance, they are considered to have the best one compared to those of other organic materials. They are not penetrated by any kinds of agents and as the most remarkable characteristic as in mechanical ones, they are known to have small frictional coefficients. They are reinforced by all these different fillings and are used for bearing of oil-free sliding.
Of the other bearings, underwater bearing makes this part that would change to a bush in this cylindrical form. It perfectly attaches to a rubber support around a body of the bush. As a result, you will not lose the bush during use.