This adapter will transfer your cabin air further back to reach the cargo space of your van or even to the backseat of your truck to either keep your kiddo or dog cooler. May even help circulate the air in the cab much faster. This will help to assist in keeping your van or truck cool in the hot summer days when you need it most. This particular model works specifically on the Ford Econoline Van, Ford F-150, and Ford F-250 with those particular vents. I want to say the models between 2008-2015 but don't hold me to that. It's set up to where you'll have to pop off the guards that protect the vent and then remove the adjustable vent blades. You would then slide this adapter slimmer side through the vent guard until it stops and then pop the vent guard back in to secure both the adapter and guard in place. I then added a 3 inch HVAC/Dryer duct to the adapter with a 3 ½ in or 4 inc hose clamp to secure the duct. You can get the length that works best for you in this scenario. I added a blower to pull the air from the cab and and push it out the end to have more circulation. Depending on your situation it might not be need. I am also looking into making a more universal design for the circular and rectangular style vents but every car is different and it's hard to narrow them all down to one without loss of air flow. Hope this helps out and if you have any ideas or suggestions, with the right measurements I could work on a custom made specific to your needs.

3 inch 8 feet Flexible Dryer Vent Hose

https://www.amazon.com/gp/product/B09B1W4N75/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

4Pcs 3" Adjustable 304 Stainless Steel Duct Clamps

https://www.amazon.com/gp/product/B07PQDRFVH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Optional

3" Inline Booster Duct Fan, Ventilation Cooling Exhaust Fan (Air flow: 55m3/h) MEDIOCRE AIR FLOW

https://www.amazon.com/gp/product/B0B1Q2QGYG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

3" Inline Blower (Airflow:170m3/h) STRONGER AIR FLOW

https://www.aliexpress.us/item/3256802314513944.html?spm=a2g0o.productlist.main.31.482d4f113rVzbe&algo_pvid=41c7dbc3-94e3-4c0e-8590-2427e3e038b8&algo_exp_id=41c7dbc3-94e3-4c0e-8590-2427e3e038b8-15&pdp_npi=4%40dis%21USD%2155.00%2136.85%21%21%2155.00%2136.85%21%402101ef6817126973202627112e760f%2112000021913535069%21sea%21US%214150890564%21&curPageLogUid=DsmkbPOcm1oA&utparam-url=scene%3Asearch%7Cquery_from%3A