PolyPro is an environmentally safe, 100% recyclable material. It is made from Polypropylene and contains no toxic or carcinogenic material, chlorides, or heavy metals. PolyPro does not release hazardous gases during combustion, and has been safely used throughout Europe for over 15 years. It is a great venting option for condensing gas appliances, and at 230°F/110°C, has a higher operating temperature limit than PVC (149°F/65°C max) or CPVC (194°F/90°C max). A variety of PolyPro venting options are in stock and ready to ship today!