Specs & Details Swappable top – just close the grip flat, press down and twist 90 degrees to swap out the top Easily remove the top to wirelessly charge your phone Allows for hands-free use with the PopMounts. Compatible with all mounts sold today Dimensions: 38.8 mm diameter x 7.7 mm H (24.25 mmH expanded) Compatibility To provide the best experience, we recommend using a smooth hard plastic case. The adhesive gel on these products may stick well to other surfaces, but we can’t guarantee that it will stick as as securely as it does with a smooth hard plastic case. Works best with: Plastic cases (smooth hard surface) May not work with: Phones with no case: may not stick as well as with a suitable case Silicone cases (and many soft cases) Textured cases (leather, textile etc.) Phones with glass surface Phones with anti-fingerprint coated surface