WIDE COMPATIBILITY: The metal phone plate (NOT MAGNETIC) is ideal for all magnetic air vent car phone holders, magnetic windshield suction cup car phone holders, car dashboard phone magnets, car phone magnet clips and other types of magnetic car phone holders. CAUTION: These metal phone plates ARE NOT MAGNETIC. ULTRA THIN and DURABLE: The magnetic car phone holder replacement metal plate is made of high quality manganese steel with the thickness of only 0.5mm, which is light and convenient, durable and not easily deformed. UNIVERSAL METAL PLATE : Two types of metal plates (round and rectangular) are available for application on multiple devices, such as mobile phones, GPS and mini tablets. STRONG ADHESION: The metal car phone plate has a strong grip to keep your device stable and secure while driving. The self-adhesive metal plate will not fall off and will remain for a long time. PROTECTIVE FILM AS A GIFT: Please use clear film before sticking adhesive metal plate so that your phone will not leave sticky residue after peeling. EASY TO USE: Just stick the thin metal plate on the back of the phone, back or inside the phone case, they work well and easy to install. Powerful compatibility Our kinds of metal plates of different sizes can be stuck on a variety of devices such as Cellphone, mini tablet, GPS device, Kindle, small Bluetooth speaker and other devices. Square metal plate specially prepared for larger devices. The metal car phone plate has strong grip to keep your device stable and safe while driving. The self-adhesive metal plate will not fall off and stay for a long time even on rough roads. The metal plate consists of five structures: sealing layer, manganese steel sheet, sealing layer, glue and film. The metal plates are NOT magnetic The metal plates are made of high quality manganese steel and have no magnetism. These are only replacement plates for the magnetic car phone holder. The smooth surface without sharp edges of the metal phone plate will not scratch your fingers or your phone. Sealing layer protects the metal plate, which is not easy to scratch and durable. High quality manganese steel is strong and not easily deformed. Mini size does not take up space. The ultra-thin and lightweight metal plate is easy to put into the phone case, and there is also a 0.5mm thin layer on the surface of the item, which does not affect the touch feeling. - Dimension: Rectangle for Larger Devices - 65x45mm Round for Smaller Devices - 40mm diameter