Plastic ventilation pipe adapter for diameter transition, round duct reducer from 100 mm to 150 mm. This is a one-piece molded ABS reducer with good sealing and wear resistance. Smooth surface, easy to install on various vent pipes. Ideal for connecting ducts of different sizes. Suitable for use with clothes dryers, bathroom fans, kitchen extractor fans, and more. This duct reducer can be used as part of a duct system for various applications, including whole house ventilation, chimney vents, air inlets, air conditioning, and heat recovery systems. Made from ABS material, it offers corrosion resistance and high durability. One-piece molded ABS construction provides leak-resistant performance. Can be used with rigid plastic duct systems—seal with tape. Compatible with flexible duct systems—secure with a hose clamp. Ideal for use with clothes dryer vents, bathroom or kitchen exhaust systems, inline exhaust fans, or range hoods. Made from ABS material, resistant to corrosion and deformation. Optimized design with smooth interior to reduce airflow resistance. Seamless structure ensures reliable sealing performance. Suitable for both indoor and outdoor applications. Installation: Attach the pipe to the duct reducer. Secure the joint with aluminum tape. Place the hose clamp over the connection and tighten with a screwdriver.