Make of ABS, it is enduring and stable, light weight, not easily damaged, and will not leak air Suitable for inner diameter 32mm, outer diameter 39mm hose Used to connecting vacuums main part and flexible vacuum brush or nozzle The design of this conversion head aims to enhances the suction power of the vacuum cleaners, making it more efficient in cleaning debris, and liquids This accessory can be easily installed, providing more option for your cleaning work