When you want a dashboard car phone mount, maybe you are worried about the suction cup of your car mount, which is not stronger, maybe you also afraid that your car dash does not accept to the suction cup of the holder. Now, with the adhesive pad, you never worry about it anymore. Everything is perfect!
The diameter: 80 mm(3.15 inches), 2in1 car phone mount would be suitable for it very well. Also, if you have a smaller suction cup than this size, that still works perfectly.