The Air Ventilation DIY Range Hood Connector is a versatile and efficient solution for improving indoor air quality. With its square bottom straight flange design, it offers easy installation and connection. This interface is specifically designed for range hoods and purifiers, ensuring purification and maintaining fresh indoor air. Made from reliable and durable materials, it is built to last and resistant to damage. Users will find it simple to operate, allowing for easy self-installation and maintenance. Features -Color:Black -Material:Plastic -Size:12.00X12.00X7.00cm/4.72X4.72X2.75in Hole distance:105mm Suitable diameter: 100mm -The square bottom straight flange design of this product is highly convenient and practical, making it an ideal choice for diy range hoods and purifiers. -With its efficient air purification capabilities, this duct reducer can help ensure that your indoor air remains fresh and clean. -Made from reliable and durable materials, this Duct Transition Fitting is built to last and can provide performance and reliability. -Thanks to its easy installation and maintenance, this ducting Connector is highly user-friendly and can be easily installed and maintained by anyone. -Whether you're looking to improve the air quality in your home or simply need a reliable and efficient ventilation solution, this air Ventilation Systems Fitting is an excellent choice. Package list: 3 x duct reducer