Round duct reducer from 100mm to 150mm. This one-piece molded ABS reducer provides excellent sealing and is wear-resistant with a smooth surface for low wind resistance. Designed for easy installation on various vent pipes, it serves as an ideal solution for duct size transition. Suitable for use with clothes dryers, bathroom fans, kitchen extractor fans, hydroponics systems, and inline exhaust fans. Constructed from high-quality ABS material, this reducer is corrosion-resistant, durable, and resistant to deformation. Its seamless design ensures a tight seal, making it suitable for both indoor and outdoor applications. Can be used in whole house ventilation, passive chimney vents, positive air inlets, air conditioning, and heat recovery systems. Compatible with rigid plastic duct systems seal with duct tape or putty. Also compatible with flexible ducting secure with a hose clamp. Ideal for connecting different diameter ducts in residential and light commercial ventilation applications. Installation: 1. Attach the duct reducer to the pipe. 2. Seal the connection with aluminum foil tape. 3. Secure with a hose clamp and tighten using a screwdriver.