Titanium - Ultra-, fireproof (withstands temperatures over 3000°F), waterproof, and rust- for protection. Engineered and tested to be -, fireproof, waterproof, shockproof, and hacker-. 24-Word Mnemonic Backup - Securely engrave or emboss your mnemonic. Tamper-proof - Any physical attempt to alter the engraving be noticeable. Laser-engraved Grid - Precisely marked spaces for clearly imprinting letters/numbers. Use a metal stamp or electric engraver for permanent marking. Universal Compatibility - Works with for Bitcoin (BTC), for (ETH), for Ledger, for , for MetaMask, and all for BIP39 wallets. Color: Black Material: TA2 Pure Titanium Package Contents: 2 x 24-bit Bitcoin mnemonic board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.