If you already have Aero 3 or 4 mirrors, you can improve the grip on some vehicles by purchasing alternative pads. If you have Aero 1 or 2 mirrors, you will need to replace your clamps with new Aero clamps 4589, or upgrade to the Platinum range. Platinum mirrors do not require any additional parts.
Also available, for Aero Mirrors.
Aero F Pads, Product code: 4664
The Aero F Pads have twin grooves for enhanced grip on typically VW group cars (Audi, Seat and Skoda) post 2013.
For the Vauxhall/Opel Astra 2016 models use the Aero 3 Mirrors and F Pads. see image
For BMW X3 use the F Pads and mount on the top of the mirror housing. Alternatively you can use the Falcon Mirror Clamps part number 4220. Do not overtighten