ESR For MagSafe Phone Grip, Dual-Side Magnetic Phone Grip,360° Adjustable Thin Magnetic Ring - Sand Storm Color. Stronger Magnetic Lock: magnetic holding force up to 3,000 g when using the official magnetic phone case or an ESR magnetic phone case; for a phone without a case, the holding force is 1,600 g; this phone grip features the largest number of N52 magnets in the industry, along with a unique three-layer magnet assembly, which consists of double-layer magnets and a layer of iron, ensuring strong magnetic attraction.
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