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Product Description: About This Item: [Universal Magnetic Adapter] – Compatible with most magnetic phone coolers, cases, and mounts, this ultra-thin steel plate (round: 6x6cm / square: 6.2x6.2cm) enables instant magnetic attachment for seamless heat dissipation or hands-free use. [High-Quality Spring Steel] – Made from durable, rust-proof spring steel, the plate ensures strong magnetic hold without interfering with wireless charging or NFC functions. Its 0.6mm slim design fits discreetly under phone cases. [Easy Installation] – Simply peel off the adhesive backing and attach the plate to your device or case. No tools required—repositionable for optimal placement and removable without residue. [Multi-Device Compatibility] – Works with smartphones, tablets, and other gadgets, transforming them into magnet-friendly devices for coolers, car mounts, or DIY magnetic setups. [Stealthy Black Finish] – The minimalist black design blends seamlessly with devices, maintaining a sleek look while enhancing functionality. Upgrade your tech accessories with this essential magnetic adapter—effortless cooling and mounting in one! Specifications Material: Spring steel Category: Magnetic sheet Color: Black Size: Round sheet is about 6*6cm, square sheet is about 6.2*6.2cm Applicable: Universal for mobile phones and tablets Package includes: 1/3/5* square sheets/round sheets (depending on your choice)