Hon&Guan Duct Reducer 6 to 4 with Dryer Vent Hose, 4'' Insulated Flexible Duct 16FT

Duct Increaser : 6 to 4 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 150mm(inner:148mm) Female Spigot - Will fit into 6 inch ducting. On the other side there is a 98mm(inner:96mm) Male Spigot - Will fit into 4 inch duct, Application : 4 to 6 inch duct reducer designed for widely used, such as air-cooled hoods, garage, attic, bathroom kitchen extractor fan, hydroponics and HVAC ventilation systems, plastic rigid ducting is perfect for DIY and trade use,4 Inch Ducting Lightproof: Thick layer of Black PVC on Hon&Guan ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 4 in diameter,3-Layer Tough: Keep your ventilation system free of rips and pin holes. Under the Black PVC layer our ducting is built with 2 layers of Aluminum Foil With a layer of PET and Steel Wire Helix to preserve the shape,keep your ventilation system free of rips and pin holes