Polyurethane tubing (TPU) is a flexible, very tough, abrasion and cut resistant plastic. Can be used for tubing and profiles. It is available in natural (transparent amber cast), stock or custom colors. It is available in hardnesses from flexible to semi-rigid.
There are two types of TPUs:
Polyester based TPU – Better physical characteristics and resistant to fuels and oils.
Polyether based TPU – Better for use with water or high humidity.