Coldbit Steel is a durable solution for your Bitcoin seed backup.
Made of 4mm thick stainless steel plate, a 2mm thick stainless steel cover and 2 nickel binding posts.
It’s designed to withstand house fire, flood, electrical shock, extreme temperatures (up to 1200 C) and humidity (corrosion resistance).
Compatible with any 24 or 12 word seeds (BIP 39) and wallets (eg. Trezor, Ledger, Electrum, Jaxx and many others).