Double Blank cards have nothing printed on them. They can be used for countless magic tricks.
Butterfly Playing Cards Marked (Blue) 3rd Edition by
Bicycle Rider Back Green Playing Cards - Butterfly Magic Store
Butterfly - Black & Silver
Butterfly Bicycle Playing Cards
Magic Makers Double Blank Face Bicycle Deck : Toys & Games
DMC ELITES: Pro Gaffs V1
Bicycle Gaff Index (Gimmicks and Online Instructions) – SoCal
Butterfly Magic Store
Magic Makers Bicycle Blank Back Normal Face Deck
The Expert under the Card Table Playing Cards - Butterfly Magic Store
Butterfly Gilded Bicycle Playing Cards