【Strong Sealing & No Leakage】: Our expandable elbows are made of PPSU material,which enables good sealing effects even after long-term use, avoids leakage caused by aging, wear and tear, etc.【Excellent Chemical Resistance】: The elbow connector fitting is highly resistant to a variety of chemicals and cleaning solutions, easy to clean, and good to be used under extreme environment conditions【High Impact Strength】: The PEX-a elbow has excellent impact strength, even at low temperatures, which is perfect for winter needs.【Long Service Life】: The applicable durability allows it to last long for decades of service life in various applications【Environmentally Friendly & Safe】: Our PEX-a fittings are fully comply with US environmental standards and are widely applied for residential water supply systems.【Multi-purpose】: Topaipe PEX-a 90 degree elbow can be used in a variety of applications, such as water supply, heating and cooling systems.