This little gem found in like new condition.  Standing 2 9/16" in height with a 3/4" diameter this is a double wall Bill Tube with a sleeve over cap with reeded edge and cross post and eye along with padlock for securing closed.

Imagine when you can borrow a banknote from a spectator and have them sign it to have it vanish but before it vanishes they see the tube in its locked condition on the table and once the discovery of vanish is made they unlock the tube and find their bill within!

This is a great effect.   Includes instructions as well as padlock with key.  Condition as new.