Airframe Pro attaches best to air vents with flat, straight louvres. Refer to the image below.
Airframe Pro fits phones and cases up to 3.7" (92 mm) in width and can accommodate most battery cases, PopSockets, and iRing accessories.
The clip is deigned with non-marking elastomer, and if used properly will not damage your car's vents. Do not force the mount on or off the vent and take care when attaching and removing your phone.