1. Material: PU/Carbon fiber 2. Weight: about 38g/piece 3. Size: about 13x9x1 cm/piece 4. Function: RFID information anti-scanning/anti-radio frequency information leakage/shielding car key signal 5. Features: double-layer design, paste opening, large capacity, easy to use, wear-resistant and durable material, easy to clean, metal keychain design, easy to carry
