Hon&Guan Boat Blower Fan 3 Inch, 3 to 4 Inch Duct Reducer, 12V Inline Boat Blower Motor Fan, Galvanized Steel Duct Increaser 4 to 3 Duct Reduce

APPROPRIATE SIZE : On one side there is a 99mm Female Spigot（inner:98mm） - Will fit into 4'' dust collection hose/4 inch fan. On the other side there is a 74mm(inner:73mm) Male Spigot - Will fit into 3 inch duct/exhaust fan., DURABLE MATERIAL : 4 inch to 3 inch duct reducer made of galvanized steel, which is stronger and more resistant to high temperatures than ordinary plastic or pvc duct reducer, and is suitable for dryer vent environments., WIDELY APPLICATION : 4in to 3in duct reducer designed for widely used, such as air-cooled hoods, garage, attic, bathroom kitchen extractor fan, hydroponics and HVAC ventilation systems, plastic rigid ducting is perfect for DIY and trade use., Marine-Grade PBT Durability : Designed for harsh marine conditions, this blower housing is made of upgraded high-performance PBT material for durability. Not only does it have an IP44 waterproof rating to protect against liquid splashes, but it also has heat resistance that exceeds standard ABS (recommended for use in environments below 140°F/60°C)., Trusted Quality : Hon&Guan is committed to researching and developing ventilation products, aiming to design better quality products. This blower fan combines high airflow, low energy consumption, safety, and long-lasting durability. If you have any questions, please feel free to contact us—we're happy to provide a satisfactory solution.