Versatile Compatibility: Compatible with both 150mm and 100mm ducting sizes, it is ideal for various indoor ventilation setups, including inline duct fans and HVAC systems150mm Ducting 100mm Ducting Stable ABS Construction: Crafted from quality ABS material, this 6 to 4 inch duct reducer is builts to resist wear, corrosion, and temperature changes, ensuring long-lasting durability for your ventilation system 100mm Ducting Hose Adapter Reliable Performance: Designed to maintain optimal airflow, this ducting adapter efficiently connects 6-inch and 4-inch ducts, minimizing air leaks and enhancing ventilation system performance with a tight, secure fit Hose Adapter Ducting Space-Saving Design: Its compact and streamlined shape allows for seamless integration into tight spaces, making it perfect for residential, commercial, or industrial air ducting projects Ducting 150mm to 100mm Reducer Easy Installation: Lightweight and user-friendly, this round air duct hose adapter connects quickly without professional tools, saving time and effort during setup and maintenance 150mm to 100mm Reducer 6 to 4 Inch Duct Reducer, Weight: 0.42328754304 Pounds, Manufacturer: DAGLLGEW_D78_5568737