The Dad Collection

4″ Dryer Vent Cleaning Vacuum Hose Adaptor. Cleaning residential dryer vents without a collection device can be messy. Use the STC304 to connect a 2″ (1.90″ ID) vacuum hose for collecting lint as you free it from the dirty duct. The STC304 slides into a standard 4″ residential dryer duct and snugly fits because of its tapered design. The 1″ access hole allows tools to be run through the duct for thorough cleaning with compressed air tools or brushes. The vacuum hose connection on the STC304 is a perfect fit for the VAC300 HEPA Filtered Bucket Vac.