Use duct connectors designed for durability and efficiency to ensure the duct connection of the ventilation system Pre-drilled mounting holes for easy and secure mounting Do not damage the connection of the ventilation pipe, prevent air leakage, and connect to the ventilation system safely Suitable for rotary dryer, bathroom or kitchen ventilation fan, hydroponic cultivation, ventilation fan duct connection Made of ABS plastic, it is compact and, Manufacturer: Rxgiasup