The stainless steel gas water heater exhaust includes a chimney elbow and a check valve, providing a secure and efficient way to vent exhaust gases. Its robust design ensures durability and reliability, while the flexible corrugated allows for easy installation in tight spaces. This product is for enhancing the safety and efficiency of your heating system. Features -Color:Silver -Material:Stainless steel -Size: 13.50X8.00X8.00cm/5.31X3.14X3.14in -stainless steel: constructed from stainless steel, ensuring high temperatures -Efficient exhaust extension: the extended design of the chimney elbow improves the efficiency of exhaust gas discharge, making your water heater more effective -Antibackflow check valve: equipped with a check valve to prevent the backflow of exhaust gases, maintaining a environment -Durable corrugated design: the corrugated structure provides flexibility and durability, making it ideal for various installation scenarios -Userfriendly installation: comes with all necessary installation tools and a detailed manual, making the setup process straightforward Package list: 4 heater exhaust pipe