If you love cool optical illusions then you'll dig this black and white vortex swirl design pop up phone grip! This pop up acts as a fun mind trick graphic for you to show all your friends! Click our brand link above to see more cool optical illusion design gifts! Adhesive backing attaches the PopGrip to your case or device. Will not stick to silicone, leather, waterproof, or highly textured cases. Works best with smooth, hard, plastic cases. Not compatible with wireless charging Printed top is swappable with other compatible PopGrip models. Just press flat, turn 90 degrees until you hear a click and remove to swap.