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Power-Only USB-C Cable

Magnetic Power-Only Cable with 3x USB-C Adapters.
Power your COLDCARD Mk4, with confidence that the data lines are not connected! Leave the USB-C adapter (3 included) attached, and then easily magnetically snap it into place as needed (a "port saver").

Only for Mk4 (not Mk3 or earlier).

Industrial MicroSD

Industrial Grade MicroSD for secure Coldcard backups.
True SLC design w/ wear-leveling & block mgmt. Environmental tested (bend / torque / salt spray / solar radiation) and harsh temperatures: -40°C to +85°C.

Picture for illustration only.


Single 24 word plate, 12 words per side! Quality, thick steel, cut and etched in Canada. Etched text marks chemically colored in black for better legibility. This design was kept small in size, for better storage and concealment. Learn more.

Center Punch sold separately. Design may vary depending on batch.

Center Punch

We recommend using this Automatic Center Punch for marking the SEEDPLATE. Just press and it will automatically snap to mark. Made out of High Speed Steel.


Water resistant metal capsule to hold your Opendimes! Big enough for a bunch of Opendimes (any generation) or a single 2.75" 12-gauge round. Colour: space grey.

OPENDIME™ sold separately.

Dice Set

Save time rolling dice with a bag of 100 cute and tiny little dice. Generates 256 bits of entropy in a single shake! Watch the video here. 100 quantity, 5mm, black/white D6 dice.

COLDCARD and SEEDPLATE sold separately.

Security Bag Kit

3 x Opaque, Tamper-Evident bags
4 x Recovery Cards
2 x ESD bags

Bag internal size is 10.5x6in


Water-resistant, black, hard-case with custom protective foam for the COLDCARD Mk4. Un-branded and low profile. see more pictures here

COLDCARD Mk4 not included.


Power your Coldcard and other low power USB devices from a standard 9-volt battery without any USB data concerns. Makes a great gift for the cypherpunk in your life. Learn more here.

Adaptor only. Cable and battery not included. 5volts at 500mA max current.

USB-C 3m Cable

White, 3 meter (9 ft), USB-C to USB-C cable. Intended to power the BLOCKCLOCK™ micro, but works with any USB-C device.

Does not include AC/DC adapter. Also works with Mk4.

USB-C Power Supply

Power your BLOCKCLOCK™ micro with this AC adapter (2A at 5v). Accepts 100-240 volts AC and makes exactly the power the MICRO craves.

Does not include cable. Also works with Mk4.

NFC Blocking Sleave

Replacement unbranded NFC blocking sleave (empty, single unit).

All of our SATSCARD, TAPSIGNER and SATSCHIP cards are shipped with this sleave included.

NFC Card Reader

Superior USB adapter so your laptop, Mac, or desktop computer can talk to our NFC Cards.

IMPORTANT: Incompatible with Mk4 NFC features! Works only with NFC cards. HID Omnikey "CL5022 CL" works well in Windows, Linux and MacOS.