The original version's tab is easy to break when removing the collar and require glue two parts together , this new version dose not need to glue any more. There is no more easy to break tabs, it's using c clip now (see pic2). Using less time and filament to print. 

There are four C clip slots but you only need to insert two on the opposite side to hold it secure

Fits Hisense portable ac exhaust hose (155mm OD hose)

rectangular window outlet size is 30mm x 200mm