Characteristics of the junction of 125mmThe metal male junction is the essential accessory for all ventilation systems. With its high quality metal construction, this junction is very resistant and guarantees a perfect seal between the ventilation components. Its specific design makes it easy to connect two ventilation ducts to lengthen the duct. It is able to withstand extreme temperatures and is weather resistant, making it a perfect choice for outdoor use. The metal male junction is easy to install and can be used with aluminum tape for an optimal seal. It is suitable for ventilation pipes of the same diameters and adapts to all types of ventilation systems. With the metal male junction, you can easily extend your ventilation duct to reach all areas of your indoor or outdoor grow space.