Product review (5 stars): A good solution for a tight fit
Whenever I would try to move my clothes dryer close to the back wall, I would often put a kink in the flexible exhaust hose (duct).  This is not good. If the exhaust hose becomes bent "too much", lint might build up inside the hose...resulting in a fire hazard. This device has allowed me to push my dryer within about 5 inches of the back wall with NO sharp bends in the hose.  My clothes actually dry a little bit faster now because of the better air flow.  Make sure that you also have three hose CLAMPS that are the same diameter as your exhaust hose.  Why? You will need one clamp to secure this device to the outlet vent in the back of the dryer; another clamp to secure your exhaust hose to the other end of this device; and another vent clamp to secure the exhaust hose to the "outlet vent" that goes into the wall (to the outside). If you are using rigid, metal ducting instead of the flexible stuff, you should still use the hose clamps.  Why?  If the exhaust hose should come loose and start spewing exhaust into your garage or home, you could very well experience health problems.  Clothes dryers that run on natural gas must always to vented to the outside of your residence.