A multi stage universal reducing pipe with a size suitable for everyone to use for PVC pipes with a diameter of 120mm 150mm 160mm. Just cut the accessories into the size you want and connect the pipes Easy to use for expanding or reducing the diameter of ventilation ducts, and connecting different fixed or flexible ducts. Easy connection of ventilation ducts to fans, inline fans, and air conditioning exhaust pipes, with different sizes of ducts. Compatible with ventilation fans, dryers, bathroom fans, and range hoods. Universal suitable for bathroom fans, range hoods, kitchens, garages, and other well ventilated homes and apartments. It is also applicable to indoor and outdoor industrial ventilation systems. The material is made of durable PVC plastic, and this connector can maintain its technical and aesthetic characteristics under different conditions. It can operate at temperatures ranging from without rusting indoors or outdoors. This material is sturdy, lightweight, flexible, and can provide comfortable and reliable use for a long time. Easy to install, first measure the correct diameter of the pipe, and then cut the joint into the required size. We suggest using a saw. Then connect the pipeline by inserting or connecting it to the connector. You may need to use tape, glue, or cable ties to secure the connection. When shopping, please pay attention to the size and dimensions of the product to ensure it meets your needs. In the title and, we provide detailed information about the product, including its features and specifications We hope you are completely satisfied with the product you have purchased, so please feel free to contact us if you have any questions or concerns. We are always ready to assist you and will do our best to provide you with help. Thank you for choosing our product. We hope you like it