2X Holding power of ordinary suction cup pad mounts. For use on on surfaces that are not 100% flat causing suction cup pad mounts to lose suction and fall off. If your car windshield is a little curved or the hood of your car is a little curved this works great. This also works great on suction cup pad mounts being used at home on a desk that is has a surface that is not as smooth as glass. For best results peel apply to inside of car windshield and allow 12-24 hours to completely seal air pockets then apply suction cup pad mount for secure mount and fit. When applying make windshield hard been cleaned and is clean. Also make sure there are no air bubble pockets like when applying screen protector on smartphone. These allow for longer use of your suction cup pad mount and can easily be replaced by new ones when old.
These are available with in 122mm diameter with 65mm open ring center and also 20mm open ring center. This model here has a 65mm open ring center. For smaller suction cup pad mounts use with 20mm open ring center and larger ones use with 65mm open ring center.
Above video shows how to use Nano Pu Gel Pad Ring with suction cup pad mount that is sold separately.