This envelope enables you to do miracles! 

Hand your spectator  the envelope. They open it themselves and take out any one of FOUR  options. This envelope can covertly conceal 4 different outs. Depending  on which way you start to open the envelope and hand it to your  spectator, they get to do the rest. 

You can also use this  envelope as an extremely deceptive switching device for playing cards,  pieces of paper and even money. The possibilities are endless. 

The Number 4 Envelope measures 3" by 4" and is extremely flat. It is made on black Tyvek  which is waterproof and tear-proof so it will last you thousands of  performances. When you purchase this effect, you will receive one  hand-made gimmicked envelope and an instructional video. On this video,  Blake will guide you through step-by-step how to use this utility  device, as well as teach you three completely thought-out routines that  you can do right away. 

Add this powerful weapon to your arsenal today. This is the Number 4 Envelope.