An aromatic polyester-based TPU is aimed at uses that require durability under harsh conditions. Texin DP7-1197 from Bayer MaterialScience, Pittsburgh, is an injection molding grade with a Shore hardness of about 88A. It has low compression set of 20% at up to 158 F, vs. 30% for competitive resins. The material is clear to slightly opaque. Applications include caster wheels and weather seals.