8 to 6 Black Metal Reducer Increaser for 6/8 Inch Ducting 2M This backdraught shutter can be

This backdraught shutter can be used for a variety of purposes including whole house ventilation

[Widely Use]: Roof dryer vent is designed for maximum airflow and protection

blocking it

including an instruction manual

Hydroponics

8 to 6 Black Metal Reducer Increaser for 6/8 Inch Ducting 2M This backdraught shutter can beDuct Increaser: 8 to 6 inch duct reducer made of metal, for connecting two ducting of different diameters or for connecting hose to inline fan exhaust vent. Either flexible duct or rigid sheet metal ducts can be used and save you space. Size: On one side there is a 200mm Female Spigot Will fit into 8 inch flexible duct. On the other side there is a 150mm Male Spigot Will fit into 6 inch ductng. Application: 8 to 6 inch duct adapter designed for widely