Round duct reducer from 100mm to 150mm. This one-piece molded ABS reducer provides a secure, leak-proof connection with excellent sealing performance and wear resistance. Smooth interior surface reduces air resistance and ensures efficient airflow. Ideal for use in whole house ventilation, passive chimney vents, positive air inlets, air conditioning, and heat recovery systems. Suitable for rigid plastic duct systems—seal with putty or tape—or with flexible ducting using a hose clamp for a tight fit. Perfect for clothes dryers, bathroom fans, kitchen extractor fans, range hoods, hydroponics, and inline extraction systems. Made from high-quality ABS material, resistant to corrosion and deformation. Seamless construction ensures reliable performance for both indoor and outdoor applications. Easy to install: connect the reducer to the duct, secure the joint with aluminum tape, then fasten with a hose clamp and tighten with a screwdriver.