Plastic ventilation pipe adapter for diameter transition, round duct reducer from 100mm to 150mm. This is a one-piece molded PVC reducer with good sealing and wear resistance. Smooth surface, easy to install on various vent pipes. Ideal solution for connecting ducts of different sizes. Suitable for use with clothes dryers, bathroom fans, kitchen extractor fans, hydroponics, and more. This duct reducer can be used as part of a duct system for various applications, including whole house ventilation, passive chimney vents, positive 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-proof performance. Can be used with rigid plastic duct systems—seal with putty or tape. Compatible with flexible duct systems—secure with a hose clamp. Suitable for dryer vents, bathroom and kitchen exhaust systems, inline exhaust fans, and range hoods. Features: - Made from new ABS material, resistant to corrosion and deformation - Optimized design with smooth interior to reduce airflow resistance - Seamless structure for excellent sealing performance - Suitable for both indoor and outdoor use Installation: 1. Attach the duct pipe to the reducer. 2. Secure the connection with aluminum tape. 3. Place a hose clamp over the joint and tighten with a screwdriver.