Cheapest (on sale) gravity mount I could find. It is made of ABS plastic and I can't say that the air vent clip that comes with the mount is sturdy enough, but it works as intended. I can easily slide in my 6.7 inch iphone.

Smart design. It extends automatically when you put the phone on, and retracts when you take off the phone. It holds the phone tightly.

Best car vent-based, gravity mount for phones I've seen, or used.

hold my phone securely

best value of the market， should have more for back up use。

Very sturdy and holds any sized phone in place with it's clever design