NEW ATC250SX 85 - 87 PLASTIC REAR FENDER TPO PLASTICS. Product are made with high standard proprietary thermoplastic olefinic elastomer (TPO), specifically designed for extreme conditions. This high-impact polypropylene alloy delivers a high-gloss finish with strength characteristics capable of enduring the tough weather and temperature conditions.These plastics are ultraviolet stabilized, resistant to chemicals, tougher than OEM products.