Round duct reducer from 100mm to 150mm. This one-piece molded ABS reducer provides a reliable, leak-proof connection with excellent sealing performance and wear resistance. Smooth interior surface reduces wind resistance and ensures efficient airflow. Ideal for use in various ventilation applications including whole house ventilation, passive chimney vents, positive air inlets, air conditioning, and heat recovery systems. Suitable for use with rigid plastic duct systemsseal with putty or tapeor with flexible ductingsecure with a hose clamp. Perfect for clothes dryers, bathroom exhaust fans, kitchen range hoods, extractor fans, hydroponic systems, and more. Made from high-quality ABS material, resistant to corrosion and deformation. Seamless construction ensures strong, durable performance for both indoor and outdoor use. Installation: 1. Attach the duct reducer to the pipe. 2. Secure the connection with aluminum tape. 3. Fasten with a hose clamp and tighten using a screwdriver.