Cryptosteel Capsule

The new backup from Cryptosteel offers highly secure storage for seed phrases of up to 123 characters. It is autonomous, personal, anonymous, and tangible.

Capsule dimensions: Length: 102mm, Diameter: 16mm.
Constructed from solid metal - 100% stainless steel.
The shell is made of AISI 303, while the core, separators, and character tiles are made of AISI 304.
The package contains all printable ASCII characters (96 different characters).

Backup compatibility is 100% suitable for:

• BIP39 (unabbreviated 12-word recovery seeds or 4-character abbreviated 24-word recovery seeds).
• Shamir Backup SLIP39 (4-letter abbreviations of 20-word recovery seeds).
• BIP32 root keys.
• WIF private keys.
• Monero mnemonic seeds (4-letter abbreviations of 25-word recovery seeds).

It offers over 99% coverage for hexadecimal strings up to 123 characters and random ASCII strings up to 55 characters.