These are a pair of boxes, black and red with a complete cover. The magician opens the black box and inside is a red box. The red box is smaller - it is removed, and you now close the black box. Put the black box into the red box. Now the black box is smaller than the red!
Repeat as often as you like. Boxes made from heavy board, Rexine coated for long life. The item "Gozinta Boxes (Stage Size) Made Famous by Lubor Fiedler" is in sale since Sunday, March 5, 2017. This item is in the category "Collectables\Fantasy, Myth & Magic\Magic\Tricks".
The seller is "mango_magic" and is located in Oakham, Rutland. This item can be shipped worldwide.