The Blockstream Capsule is the all-new way to store your keys in the physical world – bringing together user-friendliness, robust materials, and an unassuming shape for maximum portability and stash-ability.
Manufactured by Cryptosteel, our half-kilogram (1.13 lb) stainless steel capsules are shipped with 800 deeply-stamped tiles. This lets you record whatever you need in the capsule’s 123 hexademical character space – or a random ASCII strings up to 55 characters.
Simply unscrewed the capsule lid, slide the tiles in in the correct order to record your seed phrase, and seal it again for secure storage. Need more detailed instructions? Check out these quick-and-easy tutorial videos from Cryptosteel.