Plastic ventilation pipe adapter for diameter transition, round duct reducer from 100mm to 150mm. This PVC reducer is one-piece molded with good sealing and wear-resistant properties. Smooth surface for easy installation on various vent pipes. Ideal solution for connecting ducts of different diameters. 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 applications including whole house ventilation, chimney vents, air intake systems, air conditioning, and heat recovery systems. Made from ABS material, it offers corrosion resistance and high durability. One-piece molding ensures 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. Ideal for dryer vents, bathroom or kitchen exhaust systems, inline fans, and range hoods.Made from new ABS material, resistant to corrosion and deformation. Thoughtfully designed with a smooth interior to reduce airflow resistance. Seamless construction provides excellent sealing performance for both indoor and outdoor use.Installation:1. Attach the pipe to the duct reducer. 2. Secure the joint with aluminum foil tape. 3. Place the hose clamp over the connection and tighten with a screwdriver.